1 files changed, 5 insertions, 0 deletions
diff --git a/csharp/ProtocolBuffers/InvalidProtocolBufferException.cs b/csharp/ProtocolBuffers/InvalidProtocolBufferException.cs
index 10257542..4f1b1a92 100644
--- a/csharp/ProtocolBuffers/InvalidProtocolBufferException.cs
+++ b/csharp/ProtocolBuffers/InvalidProtocolBufferException.cs
@@ -71,5 +71,10 @@ namespace Google.ProtocolBuffers {
         "Protocol message was too large.  May be malicious.  " +
         "Use CodedInputStream.SetSizeLimit() to increase the size limit.");
     }
+
+    internal static InvalidProtocolBufferException InvalidMessageStreamTag() {
+      return new InvalidProtocolBufferException(
+        "Stream of protocol messages had invalid tag. Expected tag is length-delimited field 1.");
+    }
   }
 }