Minor improvements to InternalsVisibleTo in the C# end.

Author: ddobrev

src/Generator/Generators/CSharp/CSharpSources.cs

@@ -167,20 +167,7 @@ public override void Process()
 
             var module = TranslationUnits.Count == 0 ?
                 Context.Options.SystemModule : TranslationUnit.Module;
-            var hasInternalsVisibleTo = false;
-            if (Context.Options.DoAllModulesHaveLibraries())
-            {
-                foreach (var library in from m in Options.Modules
-                                        where m.Dependencies.Contains(module)
-                                        select m.LibraryName)
-                {
-                    WriteLine($"[assembly:InternalsVisibleTo(\"{library}\")]");
-                    if (!hasInternalsVisibleTo)
-                        hasInternalsVisibleTo = true;
-                }
-            }
-            if (hasInternalsVisibleTo)
-                NewLine();
+            AddInternalsVisibleTo(module);
 
             if (!string.IsNullOrEmpty(module.OutputNamespace))
             {
@@ -201,6 +188,21 @@ where m.Dependencies.Contains(module)
             }
         }
 
+        private void AddInternalsVisibleTo(Module module)
+        {
+            if (!Context.Options.DoAllModulesHaveLibraries())
+                return;
+
+            foreach (var library in from m in Options.Modules
+                                    where m.Dependencies.Contains(module)
+                                    select m.LibraryName)
+            {
+                WriteLine($"[assembly:InternalsVisibleTo(\"{library}\")]");
+                NeedNewLine();
+            }
+            NewLineIfNeeded();
+        }
+
         public void GenerateHeader()
         {
             PushBlock(BlockKind.Header);

tests/NamespacesDerived/NamespacesDerived.cs

@@ -1,4 +1,3 @@
-using System;
 using System.IO;
 using CppSharp.AST;
 using CppSharp.Generators;
@@ -41,11 +40,10 @@ public override void Postprocess(Driver driver, ASTContext ctx)
 
             driver.Generator.OnUnitGenerated += o =>
             {
-                var firstBlock = o.Templates[0].RootBlock.Blocks[1];
-                firstBlock.Text.StringBuilder.Append($@"using System.Runtime.CompilerServices;{
-                    Environment.NewLine}{
-                    Environment.NewLine}[assembly:InternalsVisibleTo(""NamespacesDerived.CSharp"")]{
-                    Environment.NewLine}");
+                Block firstBlock = o.Templates[0].RootBlock.Blocks[1];
+                firstBlock.WriteLine("using System.Runtime.CompilerServices;");
+                firstBlock.NewLine();
+                firstBlock.WriteLine("[assembly:InternalsVisibleTo(\"NamespacesDerived.CSharp\")]");
             };
         }
     }