Generate markup extensions as partial (#35)

Author: Sergio0694

src/Sample/Strings/en-US/Resources.generated.cs

@@ -346,7 +346,7 @@ public static string YourAgeAndName(double paramDouble1, string paramString2)
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
     [MarkupExtensionReturnType(ReturnType = typeof(string))]
-    public class ResourcesExtension: MarkupExtension
+    public partial class ResourcesExtension: MarkupExtension
     {
         public enum KeyEnum
         {

src/VSExtension/ReswPlus.Core/CodeGenerators/CsharpCodeGenerator.cs

@@ -220,7 +220,7 @@ protected override void CreateMarkupExtension(CodeStringBuilder builder, string
             builder.AppendLine("[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]");
             builder.AppendLine("[global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]");
             builder.AppendLine("[MarkupExtensionReturnType(ReturnType = typeof(string))]");
-            builder.AppendLine($"public class {className}: MarkupExtension");
+            builder.AppendLine($"public partial class {className}: MarkupExtension");
             builder.AppendLine("{");
             builder.AddLevel();
             builder.AppendLine("public enum KeyEnum");

src/VSExtension/Tests/MultiResourcesAndCustomNamespace/App/Dialog/en/Dialog.generated.cs

@@ -27,7 +27,7 @@ static Dialog()
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
     [MarkupExtensionReturnType(ReturnType = typeof(string))]
-    public class DialogExtension: MarkupExtension
+    public partial class DialogExtension: MarkupExtension
     {
         public enum KeyEnum
         {

src/VSExtension/Tests/MultiResourcesAndCustomNamespace/App/Strings/en/Resources.generated.cs

@@ -27,7 +27,7 @@ static Resources()
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
     [MarkupExtensionReturnType(ReturnType = typeof(string))]
-    public class ResourcesExtension: MarkupExtension
+    public partial class ResourcesExtension: MarkupExtension
     {
         public enum KeyEnum
         {

src/VSExtension/Tests/MultiResourcesAndCustomNamespace/Lib/Strings/en/Resources.generated.cs

@@ -27,7 +27,7 @@ static Resources()
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
     [MarkupExtensionReturnType(ReturnType = typeof(string))]
-    public class ResourcesExtension: MarkupExtension
+    public partial class ResourcesExtension: MarkupExtension
     {
         public enum KeyEnum
         {