diff --git a/csharp/Program.cs b/csharp/Program.cs
index 36313e27..cfcd3c9f 100644
--- a/csharp/Program.cs
+++ b/csharp/Program.cs
@@ -1,4 +1,5 @@
-using System;
+using csharp.csharp;
+using System;
 using System.Collections.Generic;
 
 namespace csharp