Fix ParamNameFilter test

Author: mythz

src/ServiceStack.OrmLite/OrmLiteDialectProviderBase.cs

@@ -181,15 +181,15 @@ public virtual void InitDbParam(IDbDataParameter dbParam, Type columnType)
         [Obsolete("Use GetStringConverter().UseUnicode")]
         public virtual bool UseUnicode
         {
-            get { return StringConverter.UseUnicode; }
-            set { StringConverter.UseUnicode = true; }
+            get => StringConverter.UseUnicode;
+            set => StringConverter.UseUnicode = true;
         }
 
         [Obsolete("Use GetStringConverter().StringLength")]
         public int DefaultStringLength
         {
-            get { return StringConverter.StringLength; }
-            set { StringConverter.StringLength = value; }
+            get => StringConverter.StringLength;
+            set => StringConverter.StringLength = value;
         }
 
         public string ParamString { get; set; } = "@";
@@ -198,14 +198,19 @@ public int DefaultStringLength
 
         public IStringSerializer StringSerializer { get; set; }
 
-        public Func<string, string> ParamNameFilter { get; set; } = OrmLiteConfig.ParamNameFilter;
+        private Func<string, string> paramNameFilter;
+        public Func<string, string> ParamNameFilter
+        {
+            get => paramNameFilter ?? OrmLiteConfig.ParamNameFilter;
+            set => paramNameFilter = value;
+        }
 
         public string DefaultValueFormat = " DEFAULT ({0})";
 
         private EnumConverter enumConverter;
         public EnumConverter EnumConverter
         {
-            get { return enumConverter; }
+            get => enumConverter;
             set
             {
                 value.DialectProvider = this;
@@ -216,7 +221,7 @@ public EnumConverter EnumConverter
         private RowVersionConverter rowVersionConverter;
         public RowVersionConverter RowVersionConverter
         {
-            get { return rowVersionConverter; }
+            get => rowVersionConverter;
             set
             {
                 value.DialectProvider = this;
@@ -227,7 +232,7 @@ public RowVersionConverter RowVersionConverter
         private ReferenceTypeConverter referenceTypeConverter;
         public ReferenceTypeConverter ReferenceTypeConverter
         {
-            get { return referenceTypeConverter; }
+            get => referenceTypeConverter;
             set
             {
                 value.DialectProvider = this;
@@ -238,7 +243,7 @@ public ReferenceTypeConverter ReferenceTypeConverter
         private ValueTypeConverter valueTypeConverter;
         public ValueTypeConverter ValueTypeConverter
         {
-            get { return valueTypeConverter; }
+            get => valueTypeConverter;
             set
             {
                 value.DialectProvider = this;
@@ -258,9 +263,7 @@ public void RegisterConverter<T>(IOrmLiteConverter converter)
         public IOrmLiteConverter GetConverter(Type type)
         {
             type = Nullable.GetUnderlyingType(type) ?? type;
-
-            IOrmLiteConverter converter;
-            return Converters.TryGetValue(type, out converter)
+            return Converters.TryGetValue(type, out IOrmLiteConverter converter)
                 ? converter
                 : null;
         }