allow utf8 encoded status message
diff --git a/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
index 2f37707..aff9550 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMethods.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -336,7 +336,7 @@
public delegate CallError grpcsharp_call_send_close_from_client_delegate(CallSafeHandle call,
BatchContextSafeHandle ctx);
public delegate CallError grpcsharp_call_send_status_from_server_delegate(CallSafeHandle call,
- BatchContextSafeHandle ctx, StatusCode statusCode, string statusMessage, MetadataArraySafeHandle metadataArray, bool sendEmptyInitialMetadata,
+ BatchContextSafeHandle ctx, StatusCode statusCode, byte[] statusMessage, UIntPtr statusMessageLen, MetadataArraySafeHandle metadataArray, bool sendEmptyInitialMetadata,
byte[] optionalSendBuffer, UIntPtr optionalSendBufferLen, WriteFlags writeFlags);
public delegate CallError grpcsharp_call_recv_message_delegate(CallSafeHandle call,
BatchContextSafeHandle ctx);