version 2.4.1.473
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestMessageSetProtoFile.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestMessageSetProtoFile.cs
index f9cec1a..d4b4fba 100644
--- a/src/ProtocolBuffers.Test/TestProtos/UnitTestMessageSetProtoFile.cs
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestMessageSetProtoFile.cs
@@ -1,4 +1,4 @@
-// Generated by ProtoGen, Version=2.3.0.277, Culture=neutral, PublicKeyToken=17b3b1f090c3ea48.  DO NOT EDIT!

+// Generated by ProtoGen, Version=2.4.1.473, Culture=neutral, PublicKeyToken=55f7125234beb589.  DO NOT EDIT!

 #pragma warning disable 1591, 0612

 #region Designer generated code

 

@@ -10,7 +10,7 @@
   

   [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

   [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

   public static partial class UnitTestMessageSetProtoFile {

   

     #region Extension registration

@@ -101,7 +101,7 @@
   #region Messages

   [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

   [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

   public sealed partial class TestMessageSet : pb::ExtendableMessage<TestMessageSet, TestMessageSet.Builder> {

     private TestMessageSet() { }

     private static readonly TestMessageSet defaultInstance = new TestMessageSet().MakeReadOnly();

@@ -199,7 +199,7 @@
     

     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

     public sealed partial class Builder : pb::ExtendableBuilder<TestMessageSet, Builder> {

       protected override Builder ThisBuilder {

         get { return this; }

@@ -337,7 +337,7 @@
   

   [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

   [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

   public sealed partial class TestMessageSetContainer : pb::GeneratedMessage<TestMessageSetContainer, TestMessageSetContainer.Builder> {

     private TestMessageSetContainer() { }

     private static readonly TestMessageSetContainer defaultInstance = new TestMessageSetContainer().MakeReadOnly();

@@ -447,7 +447,7 @@
     

     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

     public sealed partial class Builder : pb::GeneratedBuilder<TestMessageSetContainer, Builder> {

       protected override Builder ThisBuilder {

         get { return this; }

@@ -636,7 +636,7 @@
   

   [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

   [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

   public sealed partial class TestMessageSetExtension1 : pb::GeneratedMessage<TestMessageSetExtension1, TestMessageSetExtension1.Builder> {

     private TestMessageSetExtension1() { }

     private static readonly TestMessageSetExtension1 defaultInstance = new TestMessageSetExtension1().MakeReadOnly();

@@ -748,7 +748,7 @@
     

     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

     public sealed partial class Builder : pb::GeneratedBuilder<TestMessageSetExtension1, Builder> {

       protected override Builder ThisBuilder {

         get { return this; }

@@ -912,7 +912,7 @@
   

   [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

   [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

   public sealed partial class TestMessageSetExtension2 : pb::GeneratedMessage<TestMessageSetExtension2, TestMessageSetExtension2.Builder> {

     private TestMessageSetExtension2() { }

     private static readonly TestMessageSetExtension2 defaultInstance = new TestMessageSetExtension2().MakeReadOnly();

@@ -1024,7 +1024,7 @@
     

     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

     public sealed partial class Builder : pb::GeneratedBuilder<TestMessageSetExtension2, Builder> {

       protected override Builder ThisBuilder {

         get { return this; }

@@ -1189,7 +1189,7 @@
   

   [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

   [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+  [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

   public sealed partial class RawMessageSet : pb::GeneratedMessage<RawMessageSet, RawMessageSet.Builder> {

     private RawMessageSet() { }

     private static readonly RawMessageSet defaultInstance = new RawMessageSet().MakeReadOnly();

@@ -1218,11 +1218,11 @@
     #region Nested types

     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

     public static class Types {

       [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

       [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-      [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+      [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

       public sealed partial class Item : pb::GeneratedMessage<Item, Item.Builder> {

         private Item() { }

         private static readonly Item defaultInstance = new Item().MakeReadOnly();

@@ -1350,7 +1350,7 @@
         

         [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

         [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-        [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+        [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

         public sealed partial class Builder : pb::GeneratedBuilder<Item, Builder> {

           protected override Builder ThisBuilder {

             get { return this; }

@@ -1630,7 +1630,7 @@
     

     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.3.0.277")]

+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("ProtoGen", "2.4.1.473")]

     public sealed partial class Builder : pb::GeneratedBuilder<RawMessageSet, Builder> {

       protected override Builder ThisBuilder {

         get { return this; }