diff --git a/src/Directory.Packages.props b/src/Directory.Packages.props
index d717e1d..9d981af 100644
--- a/src/Directory.Packages.props
+++ b/src/Directory.Packages.props
@@ -28,5 +28,9 @@
     <PackageVersion Include="stylecop.analyzers" Version="1.2.0-beta.556" />
     <PackageVersion Include="Roslynator.Analyzers" Version="4.15.0" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.102" />
+
+    <!-- Test App Dependencies-->
+    <PackageVersion Include="ReactiveUI" Version="23.1.0-beta.1" />
+    <PackageVersion Include="ReactiveUI.SourceGenerators" Version="2.6.1" />
   </ItemGroup>
 </Project>
diff --git a/src/Splat.DI.SourceGenerator.slnx b/src/Splat.DI.SourceGenerator.slnx
index 2804aaa..e543ca2 100644
--- a/src/Splat.DI.SourceGenerator.slnx
+++ b/src/Splat.DI.SourceGenerator.slnx
@@ -21,7 +21,8 @@
   <Project Path="Splat.DependencyInjection.Analyzer/Splat.DependencyInjection.Analyzer.csproj" />
   <Project Path="Splat.DependencyInjection.SourceGenerator/Splat.DependencyInjection.SourceGenerator.csproj" />
   <Folder Name="/tests/">
-    <Project Path="Splat.DependencyInjection.Analyzer.Tests/Splat.DependencyInjection.Analyzer.Tests.csproj" />
-    <Project Path="Splat.DependencyInjection.SourceGenerator.Tests/Splat.DependencyInjection.SourceGenerator.Tests.csproj" />
+    <Project Path="tests/Splat.DependencyInjection.Analyzer.Tests/Splat.DependencyInjection.Analyzer.Tests.csproj" />
+    <Project Path="tests/Splat.DependencyInjection.SourceGenerator.Tests/Splat.DependencyInjection.SourceGenerator.Tests.csproj" />
+    <Project Path="tests/Splat.DI.SourceGenerator.TestApp/Splat.DI.SourceGenerator.TestApp.csproj" />
   </Folder>
 </Solution>
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index 7b5cb31..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(), "Test1");        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index 311551e..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(), "Test2");        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index 086f440..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete());        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index 9bf44fa..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.ICache>(() => new global::Test.Cache<string, int>(), "Test1");        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index e47b996..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.ICache>(() => new global::Test.Cache<string, int>(), "Test2");        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index ef1b6e1..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.ICache>(() => new global::Test.Cache<string, int>());        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index 3d8b9ee..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.IRepository>(() => new global::Test.Repository<global::System.Collections.Generic.List<string>>(), "Test1");        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index 72939b1..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.IRepository>(() => new global::Test.Repository<global::System.Collections.Generic.List<string>>(), "Test2");        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index 4aaa84e..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.IRepository>(() => new global::Test.Repository<global::System.Collections.Generic.List<string>>());        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index 7b22236..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,20 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete1(), "Test1");
-            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete2(), "Test1");        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index cb1c61a..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,20 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete1(), "Test2");
-            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete2(), "Test2");        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index 5455520..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,20 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {
-            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete1());
-            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete2());        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs
deleted file mode 100644
index de8a8b3..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-//HintName: Splat.DI.Reg.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
-        {        }
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.g.verified.cs b/src/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.g.verified.cs
deleted file mode 100644
index 69daa86..0000000
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.g.verified.cs
+++ /dev/null
@@ -1,144 +0,0 @@
-//HintName: Splat.DI.g.cs
-// <auto-generated/>
-
-#nullable enable annotations
-#nullable disable warnings
-
-// Suppress warnings about [Obsolete] member usage in generated code.
-#pragma warning disable CS0612, CS0618
-
-namespace Splat
-{
-    /// <summary>
-    /// Extension methods for the Splat DI source generator.
-    /// </summary>
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
-    internal static partial class SplatRegistrations
-    {
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<TInterface, TConcrete>()
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        /// <param name="mode">The threading mode.</param>
-        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
-        {
-        }
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        public static void Register<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void Register<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        public static void RegisterLazySingleton<T>()
-        {
-        }
-
-
-        /// <summary>
-        /// Registers a lazy class with its concrete class.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterLazySingleton<T>(string contract)
-        {
-        }
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
-
-        /// <summary>
-        /// Proxy for the Splat SetService.
-        /// </summary>
-        /// <param name="contract">Optional contract.</param>
-        public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        public static void SetupIOC()
-        {
-            SetupIOCInternal(Splat.Locator.GetLocator());
-        }
-
-        /// <summary>
-        /// Registers the registrations.
-        /// </summary>
-        /// <param name="resolver">The resolver to register with.</param>
-        public static void SetupIOC(Splat.IDependencyResolver resolver)
-        {
-            SetupIOCInternal(resolver);
-        }
-
-
-        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
-    }
-
-    /// <summary>
-    /// Makes the property get added by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
-    {
-    }
-
-    /// <summary>
-    /// Makes this the constructor used by the DI engine.
-    /// </summary>
-    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
-    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator/CodeGeneration/CodeGenerator.cs b/src/Splat.DependencyInjection.SourceGenerator/CodeGeneration/CodeGenerator.cs
index a65cdbf..145d7e0 100644
--- a/src/Splat.DependencyInjection.SourceGenerator/CodeGeneration/CodeGenerator.cs
+++ b/src/Splat.DependencyInjection.SourceGenerator/CodeGeneration/CodeGenerator.cs
@@ -3,7 +3,6 @@
 // See the LICENSE file in the project root for full license information.
 
 using System.Collections.Immutable;
-using System.Reflection;
 using System.Text;
 
 using Splat.DependencyInjection.SourceGenerator.Models;
@@ -15,8 +14,6 @@ namespace Splat.DependencyInjection.SourceGenerator.CodeGeneration;
 /// </summary>
 internal static class CodeGenerator
 {
-    private static readonly AssemblyName _assemblyName = typeof(Generator).Assembly.GetName();
-
     /// <summary>
     /// Generates the SetupIOCInternal method.
     /// </summary>
@@ -29,7 +26,7 @@ internal static string GenerateSetupIOCMethod(
     {
         var sb = new StringBuilder();
 
-        sb.Append($$"""
+        sb.Append("""
             // <auto-generated/>
 
             #nullable enable annotations
@@ -40,9 +37,18 @@ internal static string GenerateSetupIOCMethod(
 
             namespace Splat
             {
-                [global::System.CodeDom.Compiler.GeneratedCodeAttribute("{{_assemblyName.Name}}", "{{_assemblyName.Version}}")]
+                /// <summary>
+                /// Provides extension methods for the Splat dependency injection source generator.
+                /// This partial class contains the generated implementation of dependency registrations.
+                /// </summary>
                 internal static partial class SplatRegistrations
                 {
+                    /// <summary>
+                    /// Internal implementation of dependency injection setup.
+                    /// This method is generated at compile-time and contains all registrations
+                    /// defined through the source generator marker methods.
+                    /// </summary>
+                    /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
                     static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
                     {
             """);
diff --git a/src/Splat.DependencyInjection.SourceGenerator/Constants.cs b/src/Splat.DependencyInjection.SourceGenerator/Constants.cs
index 15aa374..f8c7e28 100644
--- a/src/Splat.DependencyInjection.SourceGenerator/Constants.cs
+++ b/src/Splat.DependencyInjection.SourceGenerator/Constants.cs
@@ -34,103 +34,138 @@ internal static class Constants
         namespace {{NamespaceName}}
         {
             /// <summary>
-            /// Extension methods for the Splat DI source generator.
+            /// Provides extension methods for the Splat dependency injection source generator.
+            /// This class contains marker methods that are analyzed at compile-time to generate
+            /// dependency injection registrations.
             /// </summary>
             [global::System.CodeDom.Compiler.GeneratedCodeAttribute("{{_assemblyName.Name}}", "{{_assemblyName.Version}}")]
             internal static partial class {{ClassName}}
             {
                 /// <summary>
-                /// Registers a class with its concrete class.
+                /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+                /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
                 /// </summary>
+                /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+                /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
                 public static void Register<TInterface, TConcrete>()
                 {
                 }
 
                 /// <summary>
-                /// Registers a class with its concrete class.
+                /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+                /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
                 /// </summary>
-                /// <param name="contract">Optional contract.</param>
+                /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+                /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+                /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
                 public static void Register<TInterface, TConcrete>(string contract)
                 {
                 }
 
                 /// <summary>
-                /// Registers a class with its concrete class.
+                /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+                /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
                 /// </summary>
+                /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+                /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
                 public static void RegisterLazySingleton<TInterface, TConcrete>()
                 {
                 }
 
                 /// <summary>
-                /// Registers a class with its concrete class.
+                /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+                /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
                 /// </summary>
-                /// <param name="mode">The threading mode.</param>
+                /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+                /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+                /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
                 public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
                 {
                 }
 
                 /// <summary>
-                /// Registers a class with its concrete class.
+                /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+                /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
                 /// </summary>
-                /// <param name="contract">Optional contract.</param>
+                /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+                /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+                /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
                 public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
                 {
                 }
 
                 /// <summary>
-                /// Registers a class with its concrete class.
+                /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+                /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
                 /// </summary>
-                /// <param name="contract">Optional contract.</param>
-                /// <param name="mode">The threading mode.</param>
+                /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+                /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+                /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+                /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
                 public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
                 {
                 }
 
                 /// <summary>
-                /// Registers a class with its concrete class.
+                /// Registers a transient dependency for type <typeparamref name="T"/>.
+                /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
                 /// </summary>
+                /// <typeparam name="T">The type to register.</typeparam>
                 public static void Register<T>()
                 {
                 }
 
 
                 /// <summary>
-                /// Registers a class with its concrete class.
+                /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+                /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
                 /// </summary>
-                /// <param name="contract">Optional contract.</param>
+                /// <typeparam name="T">The type to register.</typeparam>
+                /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
                 public static void Register<T>(string contract)
                 {
                 }
 
                 /// <summary>
-                /// Registers a lazy class with its concrete class.
+                /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+                /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
                 /// </summary>
+                /// <typeparam name="T">The type to register.</typeparam>
                 public static void RegisterLazySingleton<T>()
                 {
                 }
 
 
                 /// <summary>
-                /// Registers a lazy class with its concrete class.
+                /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+                /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
                 /// </summary>
-                /// <param name="contract">Optional contract.</param>
+                /// <typeparam name="T">The type to register.</typeparam>
+                /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
                 public static void RegisterLazySingleton<T>(string contract)
                 {
                 }
 
                 /// <summary>
-                /// Proxy for the Splat SetService.
+                /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+                /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
                 /// </summary>
-                public static void RegisterConstant<T>(T instance) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+                /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+                /// <param name="instance">The instance to register as a constant.</param>
+                public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
 
                 /// <summary>
-                /// Proxy for the Splat SetService.
+                /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+                /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
                 /// </summary>
-                /// <param name="contract">Optional contract.</param>
-                public static void RegisterConstant<T>(T instance, string contract) => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+                /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+                /// <param name="instance">The instance to register as a constant.</param>
+                /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+                public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
 
                 /// <summary>
-                /// Registers the registrations.
+                /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+                /// This method should be called once during application startup after all registration calls have been made.
                 /// </summary>
                 public static void SetupIOC()
                 {
@@ -138,9 +173,10 @@ public static void SetupIOC()
                 }
 
                 /// <summary>
-                /// Registers the registrations.
+                /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+                /// This method should be called once during application startup after all registration calls have been made.
                 /// </summary>
-                /// <param name="resolver">The resolver to register with.</param>
+                /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
                 public static void SetupIOC(Splat.IDependencyResolver resolver)
                 {
                     SetupIOCInternal(resolver);
@@ -151,16 +187,30 @@ public static void SetupIOC(Splat.IDependencyResolver resolver)
             }
 
             /// <summary>
-            /// Makes the property get added by the DI engine.
+            /// Marks a property to be injected by the dependency injection engine.
+            /// Properties marked with this attribute will have their values automatically
+            /// resolved and set by the DI container during object construction.
             /// </summary>
+            /// <remarks>
+            /// The property must have an accessible setter (public, internal, or internal protected).
+            /// The property type must be registered in the DI container, or resolution will fail at runtime.
+            /// </remarks>
             [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
             internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
             {
             }
 
             /// <summary>
-            /// Makes this the constructor used by the DI engine.
+            /// Marks a constructor as the preferred constructor for dependency injection.
+            /// When a class has multiple constructors, this attribute specifies which constructor
+            /// the DI engine should use for object construction.
             /// </summary>
+            /// <remarks>
+            /// Only one constructor per class should be marked with this attribute.
+            /// If multiple constructors exist without this attribute, the analyzer will generate
+            /// diagnostic warning SPLATDI001.
+            /// The constructor must be accessible (public, internal, or internal protected).
+            /// </remarks>
             [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
             internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
             {
diff --git a/src/tests/Splat.DI.SourceGenerator.TestApp/ConsoleLogger.cs b/src/tests/Splat.DI.SourceGenerator.TestApp/ConsoleLogger.cs
new file mode 100644
index 0000000..081df60
--- /dev/null
+++ b/src/tests/Splat.DI.SourceGenerator.TestApp/ConsoleLogger.cs
@@ -0,0 +1,17 @@
+// Copyright (c) 2019-2026 ReactiveUI Association Incorporated. All rights reserved.
+// ReactiveUI Association Incorporated licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+namespace TestApp;
+
+/// <summary>
+/// Provides a console-based implementation of <see cref="ILogger"/>.
+/// </summary>
+public class ConsoleLogger : ILogger
+{
+    /// <summary>
+    /// Logs a message to the console output with a [LOG] prefix.
+    /// </summary>
+    /// <param name="message">The message to log to the console.</param>
+    public void Log(string message) => Console.WriteLine($"[LOG] {message}");
+}
diff --git a/src/tests/Splat.DI.SourceGenerator.TestApp/ILogger.cs b/src/tests/Splat.DI.SourceGenerator.TestApp/ILogger.cs
new file mode 100644
index 0000000..d9b6c2c
--- /dev/null
+++ b/src/tests/Splat.DI.SourceGenerator.TestApp/ILogger.cs
@@ -0,0 +1,17 @@
+// Copyright (c) 2019-2026 ReactiveUI Association Incorporated. All rights reserved.
+// ReactiveUI Association Incorporated licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+namespace TestApp;
+
+/// <summary>
+/// Defines a logger contract for writing log messages.
+/// </summary>
+public interface ILogger
+{
+    /// <summary>
+    /// Logs a message to the output.
+    /// </summary>
+    /// <param name="message">The message to log.</param>
+    void Log(string message);
+}
diff --git a/src/tests/Splat.DI.SourceGenerator.TestApp/IService.cs b/src/tests/Splat.DI.SourceGenerator.TestApp/IService.cs
new file mode 100644
index 0000000..8d78a1f
--- /dev/null
+++ b/src/tests/Splat.DI.SourceGenerator.TestApp/IService.cs
@@ -0,0 +1,17 @@
+// Copyright (c) 2019-2026 ReactiveUI Association Incorporated. All rights reserved.
+// ReactiveUI Association Incorporated licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+namespace TestApp;
+
+/// <summary>
+/// Defines a service contract for retrieving messages.
+/// </summary>
+public interface IService
+{
+    /// <summary>
+    /// Gets a message from the service.
+    /// </summary>
+    /// <returns>A string containing the service message.</returns>
+    string GetMessage();
+}
diff --git a/src/tests/Splat.DI.SourceGenerator.TestApp/Program.cs b/src/tests/Splat.DI.SourceGenerator.TestApp/Program.cs
new file mode 100644
index 0000000..9e68ec4
--- /dev/null
+++ b/src/tests/Splat.DI.SourceGenerator.TestApp/Program.cs
@@ -0,0 +1,47 @@
+// Copyright (c) 2019-2026 ReactiveUI Association Incorporated. All rights reserved.
+// ReactiveUI Association Incorporated licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+using Splat;
+
+namespace TestApp;
+
+/// <summary>
+/// Entry point for the Splat DI Source Generator test application.
+/// This application demonstrates the source generator's ability to work alongside ReactiveUI.SourceGenerators
+/// without causing duplicate GeneratedCodeAttribute errors (CS0579).
+/// </summary>
+public static class Program
+{
+    /// <summary>
+    /// Main entry point for the application.
+    /// </summary>
+    /// <param name="args">Command-line arguments passed to the application.</param>
+    public static void Main(string[] args)
+    {
+        // Register dependencies using source generator
+        SplatRegistrations.Register<IService, ServiceImplementation>();
+        SplatRegistrations.Register<ILogger, ConsoleLogger>();
+        SplatRegistrations.RegisterLazySingleton<ServiceWithDependency>();
+
+        // Setup IOC
+        SplatRegistrations.SetupIOC();
+
+        // Test resolution
+        var service = Locator.Current.GetService<IService>();
+        var logger = Locator.Current.GetService<ILogger>();
+        var serviceWithDep = Locator.Current.GetService<ServiceWithDependency>();
+
+        if (service != null)
+        {
+            Console.WriteLine(service.GetMessage());
+        }
+
+        if (serviceWithDep != null)
+        {
+            serviceWithDep.DoWork();
+        }
+
+        Console.WriteLine("TestApp completed successfully!");
+    }
+}
diff --git a/src/tests/Splat.DI.SourceGenerator.TestApp/ServiceImplementation.cs b/src/tests/Splat.DI.SourceGenerator.TestApp/ServiceImplementation.cs
new file mode 100644
index 0000000..20a138f
--- /dev/null
+++ b/src/tests/Splat.DI.SourceGenerator.TestApp/ServiceImplementation.cs
@@ -0,0 +1,17 @@
+// Copyright (c) 2019-2026 ReactiveUI Association Incorporated. All rights reserved.
+// ReactiveUI Association Incorporated licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+namespace TestApp;
+
+/// <summary>
+/// Provides a concrete implementation of <see cref="IService"/>.
+/// </summary>
+public class ServiceImplementation : IService
+{
+    /// <summary>
+    /// Gets a greeting message from the service.
+    /// </summary>
+    /// <returns>A string containing "Hello from DI!".</returns>
+    public string GetMessage() => "Hello from DI!";
+}
diff --git a/src/tests/Splat.DI.SourceGenerator.TestApp/ServiceWithDependency.cs b/src/tests/Splat.DI.SourceGenerator.TestApp/ServiceWithDependency.cs
new file mode 100644
index 0000000..86112dd
--- /dev/null
+++ b/src/tests/Splat.DI.SourceGenerator.TestApp/ServiceWithDependency.cs
@@ -0,0 +1,31 @@
+// Copyright (c) 2019-2026 ReactiveUI Association Incorporated. All rights reserved.
+// ReactiveUI Association Incorporated licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+namespace TestApp;
+
+/// <summary>
+/// A service that demonstrates constructor dependency injection.
+/// </summary>
+public class ServiceWithDependency
+{
+    private readonly ILogger _logger;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ServiceWithDependency"/> class.
+    /// </summary>
+    /// <param name="logger">The logger instance to use for logging operations.</param>
+    /// <exception cref="System.ArgumentNullException">Thrown when <paramref name="logger"/> is null.</exception>
+    public ServiceWithDependency(ILogger logger)
+    {
+        _logger = logger ?? throw new System.ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>
+    /// Performs work and logs the operation using the injected logger.
+    /// </summary>
+    public void DoWork()
+    {
+        _logger.Log("Working...");
+    }
+}
diff --git a/src/tests/Splat.DI.SourceGenerator.TestApp/Splat.DI.SourceGenerator.TestApp.csproj b/src/tests/Splat.DI.SourceGenerator.TestApp/Splat.DI.SourceGenerator.TestApp.csproj
new file mode 100644
index 0000000..c3764b3
--- /dev/null
+++ b/src/tests/Splat.DI.SourceGenerator.TestApp/Splat.DI.SourceGenerator.TestApp.csproj
@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="ReactiveUI" />
+    <PackageReference Include="ReactiveUI.SourceGenerators" >
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Splat" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Splat.DependencyInjection.SourceGenerator\Splat.DependencyInjection.SourceGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
+    <ProjectReference Include="..\..\Splat.DependencyInjection.Analyzer\Splat.DependencyInjection.Analyzer.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/Splat.DependencyInjection.Analyzer.Tests/AnalyzerHelpersTests.cs b/src/tests/Splat.DependencyInjection.Analyzer.Tests/AnalyzerHelpersTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.Analyzer.Tests/AnalyzerHelpersTests.cs
rename to src/tests/Splat.DependencyInjection.Analyzer.Tests/AnalyzerHelpersTests.cs
diff --git a/src/Splat.DependencyInjection.Analyzer.Tests/AnalyzerTestHelper.cs b/src/tests/Splat.DependencyInjection.Analyzer.Tests/AnalyzerTestHelper.cs
similarity index 100%
rename from src/Splat.DependencyInjection.Analyzer.Tests/AnalyzerTestHelper.cs
rename to src/tests/Splat.DependencyInjection.Analyzer.Tests/AnalyzerTestHelper.cs
diff --git a/src/Splat.DependencyInjection.Analyzer.Tests/CodeFixTestHelper.cs b/src/tests/Splat.DependencyInjection.Analyzer.Tests/CodeFixTestHelper.cs
similarity index 100%
rename from src/Splat.DependencyInjection.Analyzer.Tests/CodeFixTestHelper.cs
rename to src/tests/Splat.DependencyInjection.Analyzer.Tests/CodeFixTestHelper.cs
diff --git a/src/Splat.DependencyInjection.Analyzer.Tests/ConstructorAnalyzerTests.cs b/src/tests/Splat.DependencyInjection.Analyzer.Tests/ConstructorAnalyzerTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.Analyzer.Tests/ConstructorAnalyzerTests.cs
rename to src/tests/Splat.DependencyInjection.Analyzer.Tests/ConstructorAnalyzerTests.cs
diff --git a/src/Splat.DependencyInjection.Analyzer.Tests/ConstructorCodeFixProviderTests.cs b/src/tests/Splat.DependencyInjection.Analyzer.Tests/ConstructorCodeFixProviderTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.Analyzer.Tests/ConstructorCodeFixProviderTests.cs
rename to src/tests/Splat.DependencyInjection.Analyzer.Tests/ConstructorCodeFixProviderTests.cs
diff --git a/src/Splat.DependencyInjection.Analyzer.Tests/PropertyAnalyzerTests.cs b/src/tests/Splat.DependencyInjection.Analyzer.Tests/PropertyAnalyzerTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.Analyzer.Tests/PropertyAnalyzerTests.cs
rename to src/tests/Splat.DependencyInjection.Analyzer.Tests/PropertyAnalyzerTests.cs
diff --git a/src/Splat.DependencyInjection.Analyzer.Tests/PropertyCodeFixProviderTests.cs b/src/tests/Splat.DependencyInjection.Analyzer.Tests/PropertyCodeFixProviderTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.Analyzer.Tests/PropertyCodeFixProviderTests.cs
rename to src/tests/Splat.DependencyInjection.Analyzer.Tests/PropertyCodeFixProviderTests.cs
diff --git a/src/Splat.DependencyInjection.Analyzer.Tests/Splat.DependencyInjection.Analyzer.Tests.csproj b/src/tests/Splat.DependencyInjection.Analyzer.Tests/Splat.DependencyInjection.Analyzer.Tests.csproj
similarity index 82%
rename from src/Splat.DependencyInjection.Analyzer.Tests/Splat.DependencyInjection.Analyzer.Tests.csproj
rename to src/tests/Splat.DependencyInjection.Analyzer.Tests/Splat.DependencyInjection.Analyzer.Tests.csproj
index 1191d0d..40ab772 100644
--- a/src/Splat.DependencyInjection.Analyzer.Tests/Splat.DependencyInjection.Analyzer.Tests.csproj
+++ b/src/tests/Splat.DependencyInjection.Analyzer.Tests/Splat.DependencyInjection.Analyzer.Tests.csproj
@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\Splat.DependencyInjection.Analyzer\Splat.DependencyInjection.Analyzer.csproj" />
+    <ProjectReference Include="..\..\Splat.DependencyInjection.Analyzer\Splat.DependencyInjection.Analyzer.csproj" />
   </ItemGroup>
 
 </Project>
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.Analyzer.Tests/TestUtilities.cs b/src/tests/Splat.DependencyInjection.Analyzer.Tests/TestUtilities.cs
similarity index 100%
rename from src/Splat.DependencyInjection.Analyzer.Tests/TestUtilities.cs
rename to src/tests/Splat.DependencyInjection.Analyzer.Tests/TestUtilities.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/CodeGeneratorTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/CodeGeneratorTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/CodeGeneratorTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/CodeGeneratorTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/DiagnosticWarningsTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/DiagnosticWarningsTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/DiagnosticWarningsTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/DiagnosticWarningsTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/EquatableArrayTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/EquatableArrayTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/EquatableArrayTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/EquatableArrayTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/GeneratorCodeGenerationTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/GeneratorCodeGenerationTests.cs
similarity index 92%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/GeneratorCodeGenerationTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/GeneratorCodeGenerationTests.cs
index 94cbe10..8cdaa39 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/GeneratorCodeGenerationTests.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/GeneratorCodeGenerationTests.cs
@@ -185,19 +185,18 @@ public async Task GenerateSetupIOCMethod_Empty_GeneratesCorrectStructure()
     }
 
     /// <summary>
-    /// Tests that GenerateSetupIOCMethod includes GeneratedCodeAttribute with version.
+    /// Tests that the extension methods file (Constants.ExtensionMethodText) includes GeneratedCodeAttribute with version.
+    /// This is the ONLY place where GeneratedCodeAttribute should appear on the SplatRegistrations partial class.
     /// </summary>
     /// <returns>A task representing the asynchronous test operation.</returns>
     [Test]
-    public async Task GenerateSetupIOCMethod_IncludesGeneratedCodeAttribute()
+    public async Task ExtensionMethodText_IncludesGeneratedCodeAttribute()
     {
-        var transients = ImmutableArray<TransientRegistrationInfo>.Empty;
-        var lazySingletons = ImmutableArray<LazySingletonRegistrationInfo>.Empty;
-
-        var result = CodeGenerator.GenerateSetupIOCMethod(transients, lazySingletons);
+        var result = Constants.ExtensionMethodText;
 
         await Assert.That(result).Contains("[global::System.CodeDom.Compiler.GeneratedCodeAttribute(");
         await Assert.That(result).Contains("Splat.DependencyInjection.SourceGenerator");
+        await Assert.That(result).Contains("internal static partial class SplatRegistrations");
     }
 
     /// <summary>
@@ -311,4 +310,23 @@ public async Task GenerateLazySingletonRegistration_WithContract_GeneratesCorrec
         var result = sb.ToString();
         await Assert.That(result).Contains(", \"MyContract\"");
     }
+
+    /// <summary>
+    /// Tests that GenerateSetupIOCMethod does NOT include GeneratedCodeAttribute to avoid duplication.
+    /// The GeneratedCodeAttribute should only appear once on the partial class (in Splat.DI.g.cs),
+    /// not on both partial class declarations, which would cause CS0579 duplicate attribute error.
+    /// </summary>
+    /// <returns>A task representing the asynchronous test operation.</returns>
+    [Test]
+    public async Task GenerateSetupIOCMethod_DoesNotIncludeDuplicateGeneratedCodeAttribute()
+    {
+        var transients = ImmutableArray<TransientRegistrationInfo>.Empty;
+        var lazySingletons = ImmutableArray<LazySingletonRegistrationInfo>.Empty;
+
+        var result = CodeGenerator.GenerateSetupIOCMethod(transients, lazySingletons);
+
+        // The GeneratedCodeAttribute should NOT be in the Splat.DI.Reg.g.cs output
+        // It should only be in Splat.DI.g.cs (from Constants.ExtensionMethodText)
+        await Assert.That(result).DoesNotContain("[global::System.CodeDom.Compiler.GeneratedCodeAttribute(");
+    }
 }
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.Reg.g.verified.cs
similarity index 66%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.Reg.g.verified.cs
index 90466b2..5ef6cfa 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.Reg.g.verified.cs
similarity index 66%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.Reg.g.verified.cs
index 5f37ba5..2782b48 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 64%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.Reg.g.verified.cs
index 388156a..5e73a74 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CI_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs
similarity index 70%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs
index fa407a3..878cfcc 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs
similarity index 70%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs
index ffaf091..0921d88 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 68%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs
index 094ee73..f1b7b92 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.Reg.g.verified.cs
similarity index 70%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.Reg.g.verified.cs
index 2a0a0ef..7642dcf 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.Reg.g.verified.cs
similarity index 70%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.Reg.g.verified.cs
index f53a27a..180d4e3 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 68%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs
index 142245f..e7588e8 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntPI_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs
similarity index 70%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs
index 2a0a0ef..7642dcf 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs
similarity index 70%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs
index f53a27a..180d4e3 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 68%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs
index 142245f..e7588e8 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.Reg.g.verified.cs
index 3acac0e..9c5f4fb 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_EP#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.Reg.g.verified.cs
index c8b3311..e1ade15 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_N#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.Reg.g.verified.cs
index f810303..cda4f55 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test1_P#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.Reg.g.verified.cs
index 5295a02..37eae07 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_EP#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.Reg.g.verified.cs
index 14a8231..47c75c2 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_N#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.Reg.g.verified.cs
index 8b89f90..45147bf 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_Test2_P#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.Reg.g.verified.cs
similarity index 74%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.Reg.g.verified.cs
index a4c2b44..b76219f 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_EP#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.Reg.g.verified.cs
similarity index 74%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.Reg.g.verified.cs
index 9f6af3a..b1f1114 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_N#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.Reg.g.verified.cs
similarity index 74%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.Reg.g.verified.cs
index e6def11..fc8fae4 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPILM_contractParameter=_P#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.Reg.g.verified.cs
index 57ad02c..ba369cf 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.Reg.g.verified.cs
index 3513373..f67b3d4 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 74%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs
index 437a651..a3a8fe8 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CMPI_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPIF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.Reg.g.verified.cs
similarity index 70%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.Reg.g.verified.cs
index 2a0a0ef..7642dcf 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.Reg.g.verified.cs
similarity index 70%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.Reg.g.verified.cs
index f53a27a..180d4e3 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 68%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs
index 142245f..e7588e8 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CPI_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs
similarity index 75%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs
index f132ac4..c556b51 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs
similarity index 75%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs
index 45da524..7901854 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 74%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs
index 63abae5..5dfaf76 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.Reg.g.verified.cs
similarity index 55%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.Reg.g.verified.cs
index 2fce028..681888e 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.Reg.g.verified.cs
similarity index 55%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.Reg.g.verified.cs
index de14154..693a587 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 55%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs
index 48e7632..6916495 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.EConstructor_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.Reg.g.verified.cs
similarity index 62%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.Reg.g.verified.cs
index 7adfaec..8bec524 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.IService>(() => new global::Test.ServiceA(), "Test1");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.Reg.g.verified.cs
similarity index 62%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.Reg.g.verified.cs
index 1ac4a26..dd23f27 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.IService>(() => new global::Test.ServiceA(), "Test2");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 61%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.Reg.g.verified.cs
index a5e6986..147ae98 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.IService>(() => new global::Test.ServiceA());
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IEnumerableDependencyInLSingleton_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.Reg.g.verified.cs
similarity index 64%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.Reg.g.verified.cs
index 7b05c3e..a9a83c7 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.Reg.g.verified.cs
similarity index 64%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.Reg.g.verified.cs
index e878bfb..8598d6c 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 64%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs
index 2770c2d..59d2403 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.IRegMx_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.Reg.g.verified.cs
similarity index 78%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.Reg.g.verified.cs
index 0cf6cd2..4f4b0a3 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test1" + " not registered with Splat resolver."), resolver.GetService<global::System.Lazy<global::Test.IService2>>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::System.Lazy<global::Test.IService2>' with contract " + "Test1" + " not registered with Splat resolver.")) { ServiceProperty1 = resolver.GetService<global::Test.IServiceProperty1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty1' with contract " + "Test1" + " not registered with Splat resolver."), ServiceProperty2 = resolver.GetService<global::Test.IServiceProperty2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty2' with contract " + "Test1" + " not registered with Splat resolver."), ServiceProperty3 = resolver.GetService<global::Test.IServiceProperty3>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty3' with contract " + "Test1" + " not registered with Splat resolver.") }, "Test1");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.Reg.g.verified.cs
similarity index 78%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.Reg.g.verified.cs
index c7d5736..eea3e84 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test2" + " not registered with Splat resolver."), resolver.GetService<global::System.Lazy<global::Test.IService2>>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::System.Lazy<global::Test.IService2>' with contract " + "Test2" + " not registered with Splat resolver.")) { ServiceProperty1 = resolver.GetService<global::Test.IServiceProperty1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty1' with contract " + "Test2" + " not registered with Splat resolver."), ServiceProperty2 = resolver.GetService<global::Test.IServiceProperty2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty2' with contract " + "Test2" + " not registered with Splat resolver."), ServiceProperty3 = resolver.GetService<global::Test.IServiceProperty3>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty3' with contract " + "Test2" + " not registered with Splat resolver.") }, "Test2");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.Reg.g.verified.cs
index bc09e64..5292978 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' not registered with Splat resolver."), resolver.GetService<global::System.Lazy<global::Test.IService2>>() ?? throw new global::System.InvalidOperationException("Dependency 'global::System.Lazy<global::Test.IService2>' not registered with Splat resolver.")) { ServiceProperty1 = resolver.GetService<global::Test.IServiceProperty1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty1' not registered with Splat resolver."), ServiceProperty2 = resolver.GetService<global::Test.IServiceProperty2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty2' not registered with Splat resolver."), ServiceProperty3 = resolver.GetService<global::Test.IServiceProperty3>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty3' not registered with Splat resolver.") });
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.LPmRegL_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs
similarity index 61%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs
index 1089d51..e26f8d1 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs
similarity index 61%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs
index 961d876..577ef31 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 60%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs
index 33b3c15..e3efca8 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs
similarity index 81%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs
index b72e113..0caa6f8 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs
similarity index 81%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs
index baa64e9..450e3d4 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 80%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs
index f547788..2ad149e 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             {
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.Reg.g.verified.cs
similarity index 75%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.Reg.g.verified.cs
index 9bd39ac..9b136be 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.IService1>(() => new global::Test.Service1(), "TestContract");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/LS.PIWithContractInLSingleton_TestContract#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/MetadataExtractorTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/MetadataExtractorTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/MetadataExtractorTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/MetadataExtractorTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/Models/ConstructorParameterTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Models/ConstructorParameterTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/Models/ConstructorParameterTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Models/ConstructorParameterTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/Models/EquatableArrayTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Models/EquatableArrayTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/Models/EquatableArrayTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Models/EquatableArrayTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/Models/PropertyInjectionTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Models/PropertyInjectionTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/Models/PropertyInjectionTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Models/PropertyInjectionTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/Models/RegistrationInfoTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Models/RegistrationInfoTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/Models/RegistrationInfoTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Models/RegistrationInfoTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/ModuleInitializer.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/ModuleInitializer.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/ModuleInitializer.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/ModuleInitializer.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.Reg.g.verified.cs
similarity index 60%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.Reg.g.verified.cs
index 446e16b..3750265 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test1" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test1" + " not registered with Splat resolver.")), "Test1");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.Reg.g.verified.cs
similarity index 60%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.Reg.g.verified.cs
index f4bf4aa..389bc7b 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test2" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test2" + " not registered with Splat resolver.")), "Test2");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 58%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.Reg.g.verified.cs
index 5bd4d26..420cd0a 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' not registered with Splat resolver."), resolver.GetService<global::Test.IService2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' not registered with Splat resolver.")));        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CI_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs
similarity index 66%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs
index ec3c13a..e8b0cc9 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.TestConcrete>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test1" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test1" + " not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' with contract " + "Test1" + " not registered with Splat resolver.") }, "Test1");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs
similarity index 66%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs
index 895ea8d..e52cf71 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.TestConcrete>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test2" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test2" + " not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' with contract " + "Test2" + " not registered with Splat resolver.") }, "Test2");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 63%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs
index e91602b..dfad494 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.TestConcrete>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' not registered with Splat resolver."), resolver.GetService<global::Test.IService2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' not registered with Splat resolver.") });        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPITypeArgument_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.Reg.g.verified.cs
similarity index 65%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.Reg.g.verified.cs
index 836ed98..55a34b5 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test1" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test1" + " not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' with contract " + "Test1" + " not registered with Splat resolver.") }, "Test1");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.Reg.g.verified.cs
similarity index 65%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.Reg.g.verified.cs
index 405e13a..e0c1e06 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test2" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test2" + " not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' with contract " + "Test2" + " not registered with Splat resolver.") }, "Test2");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 63%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs
index a963dfb..6c3394c 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' not registered with Splat resolver."), resolver.GetService<global::Test.IService2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' not registered with Splat resolver.") });        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntPI_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs
similarity index 65%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs
index 836ed98..55a34b5 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test1" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test1" + " not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' with contract " + "Test1" + " not registered with Splat resolver.") }, "Test1");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs
similarity index 65%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs
index 405e13a..e0c1e06 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test2" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test2" + " not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' with contract " + "Test2" + " not registered with Splat resolver.") }, "Test2");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 63%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs
index a963dfb..6c3394c 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' not registered with Splat resolver."), resolver.GetService<global::Test.IService2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' not registered with Splat resolver.") });        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CIntSetPI_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.Reg.g.verified.cs
similarity index 73%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.Reg.g.verified.cs
index 641279a..ee4d21f 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test1" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test1" + " not registered with Splat resolver.")) { ServiceProperty1 = resolver.GetService<global::Test.IServiceProperty1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty1' with contract " + "Test1" + " not registered with Splat resolver."), ServiceProperty2 = resolver.GetService<global::Test.IServiceProperty2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty2' with contract " + "Test1" + " not registered with Splat resolver."), ServiceProperty3 = resolver.GetService<global::Test.IServiceProperty3>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty3' with contract " + "Test1" + " not registered with Splat resolver.") }, "Test1");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.Reg.g.verified.cs
similarity index 73%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.Reg.g.verified.cs
index 67b79b2..9f2b9d5 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test2" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test2" + " not registered with Splat resolver.")) { ServiceProperty1 = resolver.GetService<global::Test.IServiceProperty1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty1' with contract " + "Test2" + " not registered with Splat resolver."), ServiceProperty2 = resolver.GetService<global::Test.IServiceProperty2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty2' with contract " + "Test2" + " not registered with Splat resolver."), ServiceProperty3 = resolver.GetService<global::Test.IServiceProperty3>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty3' with contract " + "Test2" + " not registered with Splat resolver.") }, "Test2");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 70%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs
index 0f380ba..0df4966 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' not registered with Splat resolver."), resolver.GetService<global::Test.IService2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' not registered with Splat resolver.")) { ServiceProperty1 = resolver.GetService<global::Test.IServiceProperty1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty1' not registered with Splat resolver."), ServiceProperty2 = resolver.GetService<global::Test.IServiceProperty2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty2' not registered with Splat resolver."), ServiceProperty3 = resolver.GetService<global::Test.IServiceProperty3>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty3' not registered with Splat resolver.") });        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CMPI_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPIF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CNPPSetIF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.Reg.g.verified.cs
similarity index 65%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.Reg.g.verified.cs
index 836ed98..55a34b5 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test1" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test1" + " not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' with contract " + "Test1" + " not registered with Splat resolver.") }, "Test1");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.Reg.g.verified.cs
similarity index 65%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.Reg.g.verified.cs
index 405e13a..e0c1e06 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test2" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test2" + " not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' with contract " + "Test2" + " not registered with Splat resolver.") }, "Test2");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 63%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs
index a963dfb..6c3394c 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' not registered with Splat resolver."), resolver.GetService<global::Test.IService2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' not registered with Splat resolver.")) { ServiceProperty = resolver.GetService<global::Test.IServiceProperty>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty' not registered with Splat resolver.") });        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CPI_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs
similarity index 69%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs
index 89173d6..0e6cb53 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest1>(() => new global::Test.TestConcrete1(resolver.GetService<global::Test.ITest2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.ITest2' with contract " + "Test1" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test1" + " not registered with Splat resolver.")), "Test1");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs
similarity index 69%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs
index 61ec3af..86dded9 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest1>(() => new global::Test.TestConcrete1(resolver.GetService<global::Test.ITest2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.ITest2' with contract " + "Test2" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test2" + " not registered with Splat resolver.")), "Test2");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 67%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs
index aa13a89..f8ab7b9 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest1>(() => new global::Test.TestConcrete1(resolver.GetService<global::Test.ITest2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.ITest2' not registered with Splat resolver."), resolver.GetService<global::Test.IService2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' not registered with Splat resolver.")));
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.CircularDependencyF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..224eb48
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(), "Test1");        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..15775a9
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(), "Test2");        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..24b9674
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete());        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.EConstructor_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..d7527d1
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.ICache>(() => new global::Test.Cache<string, int>(), "Test1");        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..3973072
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.ICache>(() => new global::Test.Cache<string, int>(), "Test2");        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..40b7aff
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.ICache>(() => new global::Test.Cache<string, int>());        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_MTypePms_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..027900e
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.IRepository>(() => new global::Test.Repository<global::System.Collections.Generic.List<string>>(), "Test1");        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..94b173b
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.IRepository>(() => new global::Test.Repository<global::System.Collections.Generic.List<string>>(), "Test2");        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..53e83bc
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.IRepository>(() => new global::Test.Repository<global::System.Collections.Generic.List<string>>());        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_NestedGeneric_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.Reg.g.verified.cs
similarity index 57%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.Reg.g.verified.cs
index 0ec88d8..d0569fd 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.IAppUpdateService>(() => new global::Test.AppUpdateService<string>(resolver.GetService<global::Test.IConfig>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IConfig' with contract " + "Test1" + " not registered with Splat resolver.")), "Test1");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.Reg.g.verified.cs
similarity index 57%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.Reg.g.verified.cs
index 49e010e..fb56198 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.IAppUpdateService>(() => new global::Test.AppUpdateService<string>(resolver.GetService<global::Test.IConfig>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IConfig' with contract " + "Test2" + " not registered with Splat resolver.")), "Test2");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 56%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.Reg.g.verified.cs
index 89a818f..e1c6725 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.IAppUpdateService>(() => new global::Test.AppUpdateService<string>(resolver.GetService<global::Test.IConfig>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IConfig' not registered with Splat resolver.")));
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.GenericConcreteType_SingleTypePm_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.Reg.g.verified.cs
similarity index 55%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.Reg.g.verified.cs
index 94b944b..a915ee7 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetServices<global::Test.IService>("Test1")), "Test1");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.Reg.g.verified.cs
similarity index 55%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.Reg.g.verified.cs
index 7ba6b35..238ac89 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetServices<global::Test.IService>("Test2")), "Test2");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 54%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.Reg.g.verified.cs
index 7419fea..e911830 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetServices<global::Test.IService>()));
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IEnumerableDependency_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..3b58257
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,29 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete1(), "Test1");
+            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete2(), "Test1");        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..8c6cde7
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,29 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete1(), "Test2");
+            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete2(), "Test2");        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..2f3c4c4
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,29 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {
+            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete1());
+            resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete2());        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.IRegMx_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.Reg.g.verified.cs
similarity index 55%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.Reg.g.verified.cs
index 1fe6c72..9468877 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::System.Lazy<global::Test.Service1>>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::System.Lazy<global::Test.Service1>' with contract " + "Test1" + " not registered with Splat resolver.")), "Test1");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.Reg.g.verified.cs
similarity index 55%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.Reg.g.verified.cs
index 9227bf2..61b2e14 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::System.Lazy<global::Test.Service1>>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::System.Lazy<global::Test.Service1>' with contract " + "Test2" + " not registered with Splat resolver.")), "Test2");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 53%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs
index 8bfad56..bc176fa 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::System.Lazy<global::Test.Service1>>() ?? throw new global::System.InvalidOperationException("Dependency 'global::System.Lazy<global::Test.Service1>' not registered with Splat resolver.")));        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmConstantNotRegLF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.Reg.g.verified.cs
similarity index 75%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.Reg.g.verified.cs
index 17dc366..0edc80f 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test1" + " not registered with Splat resolver."), resolver.GetService<global::System.Lazy<global::Test.IService2>>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::System.Lazy<global::Test.IService2>' with contract " + "Test1" + " not registered with Splat resolver.")) { ServiceProperty1 = resolver.GetService<global::Test.IServiceProperty1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty1' with contract " + "Test1" + " not registered with Splat resolver."), ServiceProperty2 = resolver.GetService<global::Test.IServiceProperty2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty2' with contract " + "Test1" + " not registered with Splat resolver."), ServiceProperty3 = resolver.GetService<global::Test.IServiceProperty3>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty3' with contract " + "Test1" + " not registered with Splat resolver.") }, "Test1");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.Reg.g.verified.cs
similarity index 75%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.Reg.g.verified.cs
index ec07eef..3daa6b6 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test2" + " not registered with Splat resolver."), resolver.GetService<global::System.Lazy<global::Test.IService2>>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::System.Lazy<global::Test.IService2>' with contract " + "Test2" + " not registered with Splat resolver.")) { ServiceProperty1 = resolver.GetService<global::Test.IServiceProperty1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty1' with contract " + "Test2" + " not registered with Splat resolver."), ServiceProperty2 = resolver.GetService<global::Test.IServiceProperty2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty2' with contract " + "Test2" + " not registered with Splat resolver."), ServiceProperty3 = resolver.GetService<global::Test.IServiceProperty3>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty3' with contract " + "Test2" + " not registered with Splat resolver.") }, "Test2");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 73%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs
index cc85d94..37beb8e 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' not registered with Splat resolver."), resolver.GetService<global::System.Lazy<global::Test.IService2>>() ?? throw new global::System.InvalidOperationException("Dependency 'global::System.Lazy<global::Test.IService2>' not registered with Splat resolver.")) { ServiceProperty1 = resolver.GetService<global::Test.IServiceProperty1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty1' not registered with Splat resolver."), ServiceProperty2 = resolver.GetService<global::Test.IServiceProperty2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty2' not registered with Splat resolver."), ServiceProperty3 = resolver.GetService<global::Test.IServiceProperty3>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty3' not registered with Splat resolver.") });
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.LPmNotRegLF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorNoAttrNonDIP_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs
similarity index 54%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs
index 56b374c..9d5a102 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test1" + " not registered with Splat resolver.")), "Test1");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs
similarity index 54%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs
index d5a75e7..2d4a008 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test2" + " not registered with Splat resolver.")), "Test2");        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 52%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs
index 3454eb8..2e802ea 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' not registered with Splat resolver.")));        }
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithAttr_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs
new file mode 100644
index 0000000..1067890
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -0,0 +1,27 @@
+//HintName: Splat.DI.Reg.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
+        {        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MConstructorWithMAttrsF_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs
index 2e3580e..4405166 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest1>(() => new global::Test.TestConcrete1(resolver.GetService<global::Test.IService1>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test1" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test1") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test1" + " not registered with Splat resolver.")), "Test1");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test1#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs
similarity index 76%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs
index e9a7885..ee23b8d 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest1>(() => new global::Test.TestConcrete1(resolver.GetService<global::Test.IService1>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "Test2" + " not registered with Splat resolver."), resolver.GetService<global::Test.IService2>("Test2") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' with contract " + "Test2" + " not registered with Splat resolver.")), "Test2");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_Test2#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs
similarity index 74%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs
index eff5689..e03286c 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest1>(() => new global::Test.TestConcrete1(resolver.GetService<global::Test.IService1>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' not registered with Splat resolver."), resolver.GetService<global::Test.IService2>() ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService2' not registered with Splat resolver.")));
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.MultiClassesRegistrations_contractParameter=#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
similarity index 93%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
index 6161463..cdea2ad 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Microsoft.CodeAnalysis.EmbeddedAttribute.g.verified.cs
@@ -9,7 +9,7 @@
 
 namespace Microsoft.CodeAnalysis
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
     [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
     [System.Diagnostics.Conditional("NEVER_DEFINED")]
     internal sealed class EmbeddedAttribute : System.Attribute
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.Reg.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.Reg.g.verified.cs
similarity index 66%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.Reg.g.verified.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.Reg.g.verified.cs
index 87cdf12..c86d08a 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.Reg.g.verified.cs
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.Reg.g.verified.cs
@@ -9,9 +9,18 @@
 
 namespace Splat
 {
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "1.2.0.0")]
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This partial class contains the generated implementation of dependency registrations.
+    /// </summary>
     internal static partial class SplatRegistrations
     {
+        /// <summary>
+        /// Internal implementation of dependency injection setup.
+        /// This method is generated at compile-time and contains all registrations
+        /// defined through the source generator marker methods.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
         static partial void SetupIOCInternal(Splat.IDependencyResolver resolver)
         {
             resolver.Register<global::Test.ITest>(() => new global::Test.TestConcrete(resolver.GetService<global::Test.IService1>("TestContract") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IService1' with contract " + "TestContract" + " not registered with Splat resolver.")) { ServiceProperty1 = resolver.GetService<global::Test.IServiceProperty1>("TestContract") ?? throw new global::System.InvalidOperationException("Dependency 'global::Test.IServiceProperty1' with contract " + "TestContract" + " not registered with Splat resolver.") }, "TestContract");
diff --git a/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.g.verified.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.g.verified.cs
new file mode 100644
index 0000000..6423217
--- /dev/null
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/R.PIWithContract_TestContract#Splat.DI.g.verified.cs
@@ -0,0 +1,194 @@
+//HintName: Splat.DI.g.cs
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace Splat
+{
+    /// <summary>
+    /// Provides extension methods for the Splat dependency injection source generator.
+    /// This class contains marker methods that are analyzed at compile-time to generate
+    /// dependency injection registrations.
+    /// </summary>
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Splat.DependencyInjection.SourceGenerator", "2.1.0.0")]
+    internal static partial class SplatRegistrations
+    {
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void Register<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A new instance of <typeparamref name="TConcrete"/> will be created each time <typeparamref name="TInterface"/> is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/>.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        public static void RegisterLazySingleton<TInterface, TConcrete>()
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency mapping from <typeparamref name="TInterface"/> to <typeparamref name="TConcrete"/> with a contract and specified thread safety mode.
+        /// A single instance of <typeparamref name="TConcrete"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="TInterface">The interface or base type to register.</typeparam>
+        /// <typeparam name="TConcrete">The concrete type that implements <typeparamref name="TInterface"/>.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        /// <param name="mode">The <see cref="System.Threading.LazyThreadSafetyMode"/> specifying how the singleton should be initialized in multi-threaded scenarios.</param>
+        public static void RegisterLazySingleton<TInterface, TConcrete>(string contract, System.Threading.LazyThreadSafetyMode mode)
+        {
+        }
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/>.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void Register<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a transient dependency for type <typeparamref name="T"/> with a contract.
+        /// A new instance of <typeparamref name="T"/> will be created each time it is resolved with the specified contract.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void Register<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/>.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        public static void RegisterLazySingleton<T>()
+        {
+        }
+
+
+        /// <summary>
+        /// Registers a lazy singleton dependency for type <typeparamref name="T"/> with a contract.
+        /// A single instance of <typeparamref name="T"/> will be created on first resolution and reused for all subsequent resolutions.
+        /// </summary>
+        /// <typeparam name="T">The type to register.</typeparam>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterLazySingleton<T>(string contract)
+        {
+        }
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        public static void RegisterConstant<T>(T instance) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance);
+
+        /// <summary>
+        /// Registers a constant (singleton) instance of type <typeparamref name="T"/> with the dependency resolver using a contract.
+        /// This method is a proxy for <see cref="Splat.IMutableDependencyResolver.RegisterConstant{T}(T, string?)"/>.
+        /// </summary>
+        /// <typeparam name="T">The type of the instance to register. Must be a reference type.</typeparam>
+        /// <param name="instance">The instance to register as a constant.</param>
+        /// <param name="contract">A unique string identifier to distinguish between multiple registrations of the same type.</param>
+        public static void RegisterConstant<T>(T instance, string contract) where T : class => Splat.Locator.CurrentMutable.RegisterConstant<T>(instance, contract);
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the default <see cref="Splat.Locator"/>.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        public static void SetupIOC()
+        {
+            SetupIOCInternal(Splat.Locator.GetLocator());
+        }
+
+        /// <summary>
+        /// Initializes the dependency injection container by registering all dependencies with the specified resolver.
+        /// This method should be called once during application startup after all registration calls have been made.
+        /// </summary>
+        /// <param name="resolver">The <see cref="Splat.IDependencyResolver"/> instance to register dependencies with.</param>
+        public static void SetupIOC(Splat.IDependencyResolver resolver)
+        {
+            SetupIOCInternal(resolver);
+        }
+
+
+        static partial void SetupIOCInternal(Splat.IDependencyResolver resolver);
+    }
+
+    /// <summary>
+    /// Marks a property to be injected by the dependency injection engine.
+    /// Properties marked with this attribute will have their values automatically
+    /// resolved and set by the DI container during object construction.
+    /// </summary>
+    /// <remarks>
+    /// The property must have an accessible setter (public, internal, or internal protected).
+    /// The property type must be registered in the DI container, or resolution will fail at runtime.
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Property), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionPropertyAttribute : System.Attribute
+    {
+    }
+
+    /// <summary>
+    /// Marks a constructor as the preferred constructor for dependency injection.
+    /// When a class has multiple constructors, this attribute specifies which constructor
+    /// the DI engine should use for object construction.
+    /// </summary>
+    /// <remarks>
+    /// Only one constructor per class should be marked with this attribute.
+    /// If multiple constructors exist without this attribute, the analyzer will generate
+    /// diagnostic warning SPLATDI001.
+    /// The constructor must be accessible (public, internal, or internal protected).
+    /// </remarks>
+    [System.AttributeUsage(System.AttributeTargets.Constructor), Microsoft.CodeAnalysis.Embedded]
+    internal sealed class DependencyInjectionConstructorAttribute : System.Attribute
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/RegisterLazySingletonTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/RegisterLazySingletonTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/RegisterLazySingletonTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/RegisterLazySingletonTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/RegisterTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/RegisterTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/RegisterTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/RegisterTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/RoslynHelpersTests.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/RoslynHelpersTests.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/RoslynHelpersTests.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/RoslynHelpersTests.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/Splat.DependencyInjection.SourceGenerator.Tests.csproj b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Splat.DependencyInjection.SourceGenerator.Tests.csproj
similarity index 85%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/Splat.DependencyInjection.SourceGenerator.Tests.csproj
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Splat.DependencyInjection.SourceGenerator.Tests.csproj
index c79618a..fce7e23 100644
--- a/src/Splat.DependencyInjection.SourceGenerator.Tests/Splat.DependencyInjection.SourceGenerator.Tests.csproj
+++ b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/Splat.DependencyInjection.SourceGenerator.Tests.csproj
@@ -19,6 +19,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\Splat.DependencyInjection.SourceGenerator\Splat.DependencyInjection.SourceGenerator.csproj" />
+    <ProjectReference Include="..\..\Splat.DependencyInjection.SourceGenerator\Splat.DependencyInjection.SourceGenerator.csproj" />
   </ItemGroup>
 </Project>
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/TestBase.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/TestBase.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/TestBase.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/TestBase.cs
diff --git a/src/Splat.DependencyInjection.SourceGenerator.Tests/TestHelper.cs b/src/tests/Splat.DependencyInjection.SourceGenerator.Tests/TestHelper.cs
similarity index 100%
rename from src/Splat.DependencyInjection.SourceGenerator.Tests/TestHelper.cs
rename to src/tests/Splat.DependencyInjection.SourceGenerator.Tests/TestHelper.cs