diff --git a/compiler/cpp/src/generate/t_csharp_generator.cc b/compiler/cpp/src/generate/t_csharp_generator.cc
index ca266e7..7687eef 100644
--- a/compiler/cpp/src/generate/t_csharp_generator.cc
+++ b/compiler/cpp/src/generate/t_csharp_generator.cc
@@ -826,7 +826,7 @@
   start_csharp_namespace(f_service_);
 
   indent(f_service_) <<
-    "public class " << service_name_ << " {" << endl;
+    "public partial class " << service_name_ << " {" << endl;
   indent_up();
 
   generate_service_interface(tservice);