using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace lab1
{
    class Program
    {
        static void Main(string[] args)
        {
            TcpListener server = new TcpListener(IPAddress.Parse("127.0.0.1"), 5555);
            ThreadPool.QueueUserWorkItem(ThreadProcServer, server);
            while (true) ;
            
        }
        static void ThreadProcServer(Object stateInfo)
        {
            TcpListener server = (TcpListener)stateInfo;
            server.Start();
            while (true)
            {
                ThreadPool.QueueUserWorkItem(ThreadProcClient, server.AcceptTcpClient());
            }
        }
        static void ThreadProcClient(Object stateInfo)
        {
            TcpClient client = (TcpClient)stateInfo;
            try
            {
                while (true)
                {
                    byte[] buffer = new byte[1024];
                    int l = client.GetStream().Read(buffer, 0, 1024);
                    client.GetStream().Write(buffer, 0, l);
                    Console.WriteLine(Encoding.ASCII.GetString(buffer).Substring(0, l));
                }
            }
            catch(Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }

    }
}