public void ChatRecvThread()
        {
            byte[] recvData = new byte[CONSTANTNUMBER.DEFAULT_MESSAGA];
            string str;

            while (true)
            {
                clientChatSock.Receive(recvData);
                str = ByteAndString.ByteToString(recvData);
                Console.WriteLine(str);
            }
        }
        public void ChatSendThread()
        {
            byte[] sendData = new byte[CONSTANTNUMBER.DEFAULT_MESSAGA];
            String str;

            while (true)
            {
                str = Console.ReadLine();
                //Console.WriteLine(str); //
                sendData = ByteAndString.StringToByte(str);
                //Console.WriteLine(sendData.Length); //
                clientChatSock.Send(sendData);
            }
        }