message: Agent connection established handler didn't set the message observer.
diff: @@ -47,7 +47,7 @@ namespace Indy.Sdk.Dotnet.Wrapper
  var connection = new Agent.Connection(connectionHandle);
  _connections.Add(connectionHandle, connection);
  - var messageObserver = RemoveMessageObserver(xCommandHandle);
  + connection.MessageObserver = RemoveMessageObserver(xCommandHandle);
  taskCompletionSource.SetResult(connection);
  };
  