C# uses Socket to implement the method of sending and receiving pictures

using System;
using ;
using ;
using ;
using ;
using ;
namespace ConsoleApplication1
{
  Class Program
  {
    static void Main (String[] args)
    {
      // 1. to create a socket
      Socket sListen = new Socket (, , );
      // 2. Fill IP
      IPAddress IP =  ("127.0.0.1");
      IPEndPoint IPE = new IPEndPoint (IP, 4321);
      // 3. binding
       (IPE);
      // 4. Monitor
       ("Service is listening ...");
       (2);
      // 5. loop to accept client connection requests
      while (true)
      {
        Socket clientSocket;
        try
        {
          clientSocket =  ();
        }
        catch
        {
          throw;
        }
        // send data to the client
        // ( ("I am a server, you there?? !!!!"));
        // send the file
        byte[] buffer = ReadImageFile ("");
         (buffer, , );
         ("Send success!");
      }
    }
    private static byte[] ReadImageFile (String img)
    {
      FileInfo fileinfo = new FileInfo (img);
      byte[] buf = new byte[];
      FileStream fs = new FileStream (img, , );
       (buf, 0, );
       ();
      // ();
       (fileinfo);
       (fs);
      return buf;
    }
  }
}

using System;
using ;
using ;
using ;
using ;
using ;
namespace ConsoleApplication2
{
  Class Program
  {
    static void Main (String[] args)
    {
      // 1. to create a socket
      Socket S = new Socket (, , );
      // 2. fill in the remote IP
      IPAddress IP =  ("127.0.0.1");
      IPEndPoint IPE = new IPEndPoint (IP, 4321);
       ("started connection service ....");
      // 3. connect to the server
       (IPE);
      // 4. receive data
      byte[] buffer = new byte[1000000];
       (buffer, , );
      //var Msg =  (buffer);
      // ("received message: (0)", msg);
       ("Receive success");
      FileStream fs =  ("");
       (buffer, 0, );
       ();
       ();
    }
  }
}