Only I Can

static void Main(string[] args)
        {
            if (args.Length < 2)
            {
                Console.WriteLine(
                    "사용법 : {0}    ", 
                    Process.GetCurrentProcess().ProcessName);
                return;
            }

            string    bindIp   = args[0];
            int       bindPort = Convert.ToInt32(args[1]);
            string    serverIp   = args[2];
            const int serverPort = 5425;
            string    message  = args[3];
            
            try
            {
                IPEndPoint clientAddress = 
                    new IPEndPoint(IPAddress.Parse(bindIp), bindPort);
                IPEndPoint serverAddress =
                    new IPEndPoint(IPAddress.Parse(serverIp), serverPort);

                Console.WriteLine("클라이언트: {0}, 서버:{1}", 
                    clientAddress.ToString(), serverAddress.ToString());

                TcpClient client = new TcpClient(clientAddress);

                client.Connect(serverAddress);
                
                byte[] data = System.Text.Encoding.Default.GetBytes(message);

                NetworkStream stream = client.GetStream();

                stream.Write(data, 0, data.Length);

                Console.WriteLine("송신: {0}", message);

                data = new byte[256];

                string responseData = "";

                int bytes = stream.Read(data, 0, data.Length);
                responseData = Encoding.Default.GetString(data, 0, bytes);
                Console.WriteLine("수신: {0}", responseData);

                stream.Close();
                client.Close();
            }
            catch (SocketException e)
            {
                Console.WriteLine(e);
            }

            Console.WriteLine("클라이언트를 종료합니다.");
        }
}