private void JoinChannelBlock(AgoraRtmJoinChannelErrorCode errorCode)
        {
            Console.WriteLine($"join channel error: {errorCode}");

            if (errorCode == AgoraRtmJoinChannelErrorCode.Ok)
            {
                PressedReturnToSendText(ChannelOrPeerName, $"{AgoraRtm.Current} join");
            }
        }
        private void JoinChannelBlock(AgoraRtmJoinChannelErrorCode errorCode)
        {
            var success = errorCode == AgoraRtmJoinChannelErrorCode.Ok;

            OnJoinChannel?.Invoke(success);
            if (success)
            {
                Console.WriteLine($"RTM join channel successsful");
            }
            else
            {
                Console.WriteLine($"RTM join channel error: {errorCode}");
            }
        }