diff --git a/lib/csharp/src/Thrift.csproj b/lib/csharp/src/Thrift.csproj
index 0263d72..0722c18 100644
--- a/lib/csharp/src/Thrift.csproj
+++ b/lib/csharp/src/Thrift.csproj
@@ -1,4 +1,4 @@
-﻿<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <!--
   Licensed to the Apache Software Foundation (ASF) under one
   or more contributor license agreements. See the NOTICE file
@@ -77,6 +77,7 @@
     <Reference Include="System.Web" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Collections\TCollections.cs" />
     <Compile Include="Collections\THashSet.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Protocol\TAbstractBase.cs" />
@@ -137,4 +138,4 @@
   <ProjectExtensions>
     <VisualStudio AllowExistingFolder="true" />
   </ProjectExtensions>
-</Project>
\ No newline at end of file
+</Project>