fix comments
diff --git a/csharp/src/ProtocolBuffers.Test/FieldPresenceTest.cs b/csharp/src/ProtocolBuffers.Test/FieldPresenceTest.cs
index e0c0769..b607167 100644
--- a/csharp/src/ProtocolBuffers.Test/FieldPresenceTest.cs
+++ b/csharp/src/ProtocolBuffers.Test/FieldPresenceTest.cs
@@ -163,7 +163,7 @@
         }

 

         [Fact]

-        public void TestSeralizeAndParse()

+        public void TestSerializeAndParse()

         {

             TestAllTypes.Builder builder = TestAllTypes.CreateBuilder();

             builder.SetOptionalInt32(1234);

diff --git a/csharp/src/ProtocolBuffers/Descriptors/FileDescriptor.cs b/csharp/src/ProtocolBuffers/Descriptors/FileDescriptor.cs
index 307e9dd..fed032b 100644
--- a/csharp/src/ProtocolBuffers/Descriptors/FileDescriptor.cs
+++ b/csharp/src/ProtocolBuffers/Descriptors/FileDescriptor.cs
@@ -56,13 +56,13 @@
 

         public enum ProtoSyntax

         {

-            PROTO2,

-            PROTO3

+            Proto2,

+            Proto3

         }

 

         public ProtoSyntax Syntax

         {

-            get { return proto.Syntax == "proto3" ? ProtoSyntax.PROTO3 : ProtoSyntax.PROTO2; }

+            get { return proto.Syntax == "proto3" ? ProtoSyntax.Proto3 : ProtoSyntax.Proto2; }

         }

 

         private FileDescriptor(FileDescriptorProto proto, FileDescriptor[] dependencies, DescriptorPool pool, bool allowUnknownDependencies)

diff --git a/csharp/src/ProtocolBuffers/FieldAccess/FieldAccessorTable.cs b/csharp/src/ProtocolBuffers/FieldAccess/FieldAccessorTable.cs
index d5c6c9c..6e20b14 100644
--- a/csharp/src/ProtocolBuffers/FieldAccess/FieldAccessorTable.cs
+++ b/csharp/src/ProtocolBuffers/FieldAccess/FieldAccessorTable.cs
@@ -68,7 +68,7 @@
         {

             this.descriptor = descriptor;

             accessors = new IFieldAccessor<TMessage, TBuilder>[descriptor.Fields.Count];

-            bool supportFieldPresence = descriptor.File.Syntax == FileDescriptor.ProtoSyntax.PROTO2;

+            bool supportFieldPresence = descriptor.File.Syntax == FileDescriptor.ProtoSyntax.Proto2;

             for (int i = 0; i < accessors.Length; i++)

             {

                 accessors[i] = CreateAccessor(descriptor.Fields[i], propertyNames[i], supportFieldPresence);

diff --git a/csharp/src/ProtocolBuffers/FieldAccess/SinglePrimitiveAccessor.cs b/csharp/src/ProtocolBuffers/FieldAccess/SinglePrimitiveAccessor.cs
index df9deda..b9ab729 100644
--- a/csharp/src/ProtocolBuffers/FieldAccess/SinglePrimitiveAccessor.cs
+++ b/csharp/src/ProtocolBuffers/FieldAccess/SinglePrimitiveAccessor.cs
@@ -43,7 +43,6 @@
         where TBuilder : IBuilder<TMessage, TBuilder>

     {

         private readonly Type clrType;

-        private readonly FieldDescriptor field;

         private readonly Func<TMessage, object> getValueDelegate;

         private readonly Action<TBuilder, object> setValueDelegate;

         private readonly Func<TMessage, bool> hasDelegate;