C# socket例子

 public static void StartClient()
        {
            // Data buffer for incoming data.
            byte[] bytes = new byte[1024];

            // Connect to a remote device.
            try
            {
                // Establish the remote endpoint for the socket.
                // This example uses port 11000 on the local computer.
                IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
                IPAddress ipAddress = ipHostInfo.AddressList[0];
                IPEndPoint remoteEP = new IPEndPoint(ipAddress, 11000);

                // Create a TCP/IP  socket.
                Socket sender = new Socket(AddressFamily.InterNetwork,
                   SocketType.Stream, ProtocolType.Tcp);
                // Connect the socket to the remote endpoint. Catch any errors.
                try
                {
                    sender.Connect(remoteEP);

                    Console.WriteLine("Socket connected to {0}",
                       sender.RemoteEndPoint.ToString());

                    string tempStr = GetContent(Console.ReadLine());
                    while (true)
                    {

                  

                   
                        Console.WriteLine("輸入資訊");

                        // Encode the data string into a byte array.
                        byte[] msg = Encoding.GetEncoding("gb2312").GetBytes(tempStr + "<EOF>");

                        // Send the data through the socket.
                        int bytesSent = sender.Send(msg);

                        // Receive the response from the remote device.
                        int bytesRec = sender.Receive(bytes);
                        Console.WriteLine("Echoed test = {0}",
                            Encoding.ASCII.GetString(bytes, 0, bytesRec));
                 
                        Console.WriteLine("輸入資訊 輸入e退出");
                        tempStr = GetContent(Console.ReadLine());
                         if (tempStr == "e")
                             break;
                    }
                    // Release the socket.
                    sender.Shutdown(SocketShutdown.Both);
                    sender.Close();

                }
                catch (ArgumentNullException ane)
                {
                    Console.WriteLine("ArgumentNullException : {0}", ane.ToString());
                }
                catch (SocketException se)
                {
                    Console.WriteLine("SocketException : {0}", se.ToString());
                }
                catch (Exception e)
                {
                    Console.WriteLine("Unexpected exception : {0}", e.ToString());
                }

            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }
           
        }