diff --git a/TBF/TBF.csproj b/TBF/TBF.csproj
index 49b320d5c..9f2b978dd 100644
--- a/TBF/TBF.csproj
+++ b/TBF/TBF.csproj
@@ -117,6 +117,7 @@
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\log4net.2.0.2\lib\net40-full\log4net.dll</HintPath>
     </Reference>
+    <Reference Include="Microsoft.CSharp" />
     <Reference Include="Microsoft.VisualBasic">
       <Private>True</Private>
     </Reference>