diff --git a/lib/csharp/src/Thrift.csproj b/lib/csharp/src/Thrift.csproj
index 9f3f620..1eb4355 100644
--- a/lib/csharp/src/Thrift.csproj
+++ b/lib/csharp/src/Thrift.csproj
@@ -38,14 +38,9 @@
     <Reference Include="System.Core">
       <RequiredTargetFramework>3.5</RequiredTargetFramework>
     </Reference>
-    <Reference Include="System.Data" />
-    <Reference Include="System.Data.DataSetExtensions" />
-    <Reference Include="System.Drawing" />
-    <Reference Include="System.Windows.Forms" />
-    <Reference Include="System.Xml" />
-    <Reference Include="System.Xml.Linq" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Collections\THashSet.cs" />
     <Compile Include="Protocol\TBase.cs" />
     <Compile Include="Protocol\TBinaryProtocol.cs" />
     <Compile Include="Protocol\TField.cs" />