diff --git a/lib/csharp/src/Thrift.45.csproj b/lib/csharp/src/Thrift.45.csproj
index 949f373..78089fc 100644
--- a/lib/csharp/src/Thrift.45.csproj
+++ b/lib/csharp/src/Thrift.45.csproj
@@ -35,7 +35,7 @@
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
     <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DefineConstants>TRACE;DEBUG;NET45</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
@@ -43,7 +43,7 @@
     <DebugType>pdbonly</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
+    <DefineConstants>TRACE;NET45</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
@@ -88,17 +88,17 @@
     <Compile Include="Server\TThreadedServer.cs" />
     <Compile Include="Server\TThreadPoolServer.cs" />
     <Compile Include="TApplicationException.cs" />
+    <Compile Include="TAsyncProcessor.cs" />
     <Compile Include="TControllingHandler.cs" />
     <Compile Include="TException.cs" />
-    <Compile Include="TAsyncProcessor.cs" />
     <Compile Include="TProcessor.cs" />
     <Compile Include="TProcessorFactory.cs" />
     <Compile Include="TPrototypeProcessorFactory.cs" />
     <Compile Include="Transport\TBufferedTransport.cs" />
     <Compile Include="Transport\TFramedTransport.cs" />
-    <Compile Include="Transport\THttpTaskAsyncHandler.cs" />
     <Compile Include="Transport\THttpClient.cs" />
     <Compile Include="Transport\THttpHandler.cs" />
+    <Compile Include="Transport\THttpTaskAsyncHandler.cs" />
     <Compile Include="Transport\TMemoryBuffer.cs" />
     <Compile Include="Transport\TNamedPipeClientTransport.cs" />
     <Compile Include="Transport\TNamedPipeServerTransport.cs" />
@@ -106,6 +106,7 @@
     <Compile Include="Transport\TServerTransport.cs" />
     <Compile Include="Transport\TSilverlightSocket.cs" />
     <Compile Include="Transport\TSocket.cs" />
+    <Compile Include="Transport\TSocketVersionizer.cs" />
     <Compile Include="Transport\TStreamTransport.cs" />
     <Compile Include="Transport\TTLSServerSocket.cs" />
     <Compile Include="Transport\TTLSSocket.cs" />