private void Test()
        {
            var channel = new Channel("127.0.0.1:6565", ChannelCredentials.Insecure);

            var client = new EchoService.EchoServiceClient(channel);

            var reply = client.EchoService(new EchoMessage {
                Message = "test"
            });

            channel.ShutdownAsync().Wait();
        }
        public void Echo()
        {
            Debug.Log("echo start");

            var channel = new Channel("127.0.0.1" + kPortNum, ChannelCredentials.Insecure);

            var client = new EchoService.EchoServiceClient(channel);

            var reply = client.EchoService(new EchoMessage {
                Message = echoField_.text
            });

            Debug.Log("<color=red>" + reply.Message + "</color>");

            channel.ShutdownAsync().Wait();
            Debug.Log("echo End");
        }