first pass at adding required changes
diff --git a/src/ProtocolBuffers.Serialization/ProtocolBuffers.Serialization.csproj b/src/ProtocolBuffers.Serialization/ProtocolBuffers.Serialization.csproj
index 0c53577..fdbbe50 100644
--- a/src/ProtocolBuffers.Serialization/ProtocolBuffers.Serialization.csproj
+++ b/src/ProtocolBuffers.Serialization/ProtocolBuffers.Serialization.csproj
@@ -98,6 +98,9 @@
   </ItemGroup>

   <ItemGroup>

     <Compile Include="Extensions.cs" />

+    <Compile Include="Http\MessageFormatFactory.cs" />

+    <Compile Include="Http\MessageFormatOptions.cs" />

+    <Compile Include="Http\ServiceExtensions.cs" />

     <Compile Include="Properties\AssemblyInfo.cs" />

     <Compile Include="AbstractReader.cs" />

     <Compile Include="AbstractTextReader.cs" />