diff --git a/lib/csharp/src/TApplicationException.cs b/lib/csharp/src/TApplicationException.cs
index 409aa4d..0c5b08b 100644
--- a/lib/csharp/src/TApplicationException.cs
+++ b/lib/csharp/src/TApplicationException.cs
@@ -103,7 +103,7 @@
 
             oprot.WriteStructBegin(struc);
 
-            if (!String.IsNullOrEmpty(Message))
+            if (!string.IsNullOrEmpty(Message))
             {
                 field.Name = "message";
                 field.Type = TType.String;