--- /dev/null
+diff --git a/win/C#/interop/EncodeCompletedEventArgs.cs b/win/C#/interop/EncodeCompletedEventArgs.cs
+new file mode 100644
+index 0000000..a96afa2
+--- /dev/null
++++ b/win/C#/interop/EncodeCompletedEventArgs.cs
+@@ -0,0 +1,12 @@
++using System;\r
++using System.Collections.Generic;\r
++using System.Linq;\r
++using System.Text;\r
++\r
++namespace HandBrake.Interop\r
++{\r
++ public class EncodeCompletedEventArgs : EventArgs\r
++ {\r
++ public bool Error { get; set; }\r
++ }\r
++}\r