解决问题了.class server 
    { 
//3825--我在路由里面开的一个端口指向我台机 
        private const int portNum = 3825;          [STAThread]  
        static void Main(string[] args)  
        {  
            bool done = false; 
            IPAddress address = IPAddress.Parse("192.168.1.101");
            TcpListener listener = new TcpListener(address, portNum); 
            listener.Start();  
            while (!done)  
            {  
                Console.Write("Waiting for connection...");  
                TcpClient client = listener.AcceptTcpClient();                  Console.WriteLine("Connection accepted.");  
                NetworkStream ns = client.GetStream();                  byte[] byteTime = Encoding.ASCII.GetBytes(DateTime.Now.ToString());                  try  
                {  
                    ns.Write(byteTime, 0, byteTime.Length);  
                    ns.Close();  
                    client.Close();  
                }  
                catch (Exception e)  
                {  
                Console.WriteLine(e.ToString());  
            }  
        }          listener.Stop();  
        }      }