OnError ignore specific errors.

[doguRune]

       private void SendError(SocketError error)
        {
            // Skip disconnect errors
            if ((error == SocketError.ConnectionAborted) ||
                (error == SocketError.ConnectionRefused) ||
                (error == SocketError.ConnectionReset) ||
                (error == SocketError.OperationAborted) ||
                (error == SocketError.Shutdown))
                return;

            OnError(error);
        }

Hi there, why are these error types ignored? Client is disconnecting, but I cannot see the reason behind it because no event triggered.