기억력이 딸리는 블로거

        using System.Net.Sockets;
        using System.Threading;

        private TcpListener client;

        public ServerForm()
        {
            InitializeComponent();
        }

        private void ServerForm_Load(object sender, EventArgs e)
        {
            // 클라이언트의 접속요청을 받는 스레드 시작
            Thread thr = new Thread(new ThreadStart(ListenerThread));
            thr.Start();
        }

        public void ListenerThread()
        {
            client = new TcpListener(12345);
            client.Start();

            while (true)
            {
                // 클라이언트의 연결 요청 확인
                while (!client.Pending())
                {
                    Thread.Sleep(100);
                }

                // 클라이언트와의 통신처리 스레드 시작
                ConnectionHandler newConnection = new ConnectionHandler();
                newConnection.threadListener = this.client;
                Thread newThread = new Thread(new ThreadStart(newConnection.clientHandler));
                newThread.Start();
            }
        }
    }

    public class ConnectionHandler
    {
        public TcpListener threadListener;

        public void clientHandler()
        {
            TcpClient client = threadListener.AcceptTcpClient();
            NetworkStream ns = client.GetStream();

            string msg = "Welcome to server\n";

            byte[] send = Encoding.ASCII.GetBytes(msg);

            for (int i = 0; i < 10; i++)
            {
                ns.Write(send, 0, send.Length);
                Thread.Sleep(1000);
            }
        }
    }

    using System.Net.Sockets;
    using System.Threading;

    public partial class Form1 : Form
    {
        private TcpClient server;
        private NetworkStream ns;
        private bool isRunning = true;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                server = new TcpClient("127.0.0.1", 12345);
                ns = server.GetStream();
                Thread recvThread = new Thread(new ThreadStart(RecvThread));
                recvThread.Start();
            }
            catch (SocketException)
            {
                MessageBox.Show("서버와의 연결에 실패했습니다.");
            }
        }

        delegate void LogToForm(string msg);
        private void Log(string msg)
        {
            serverMessage.AppendText(msg);
            serverMessage.ScrollToCaret();
        }

        public void RecvThread()
        {
            byte[] buffer = new byte[1024];
            string msg;

            while (isRunning)
            {
                try
                {
                    ns.Read(buffer, 0, buffer.Length);
                    msg = Encoding.ASCII.GetString(buffer);
                    serverMessage.Invoke(new LogToForm(Log), new object[] { msg });
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            isRunning = false;

            ns.Close();
            server.Close();
        }
    }