... chương trình cho phía máy chủ IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050); Socket newsock = Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType .Tcp) ; newsock.Bind(ipep); ... IPEndPoint LocalEndPoint = new IPEndPoint(IPAddress.Any, 8080); TcpListener server = new TcpListener(LocalEndPoint); server.Start(); while (true) { TcpClient client = server.AcceptTcpClient(); ... Program { static void Main(string[] args) { IPEndPoint iep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 2009); TcpListener server = new TcpListener(iep); server.Start(); while...