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

namespace Client
{
    class Program
    {
        public class AsyncClient
        {
            private Socket Client;
            private byte[] buffer;

            public AsyncClient()
            {
                Setup();
                Console.ReadKey();
            }
            private void Setup()
            {
                try
                {
                    Client = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
                    Client.BeginConnect(new IPEndPoint(IPAddress.Loopback, 1111), new AsyncCallback(ConnectCallBack), null);

                    Send();
                }
                catch(Exception ex)
                {
                    Console.WriteLine(ex.ToString());
                }
            }

            private void ConnectCallBack(IAsyncResult AR)
            {
                try
                {
                    Client.EndAccept(AR);
                    Console.WriteLine("Connected.");
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.ToString());
                }
            }
            private void Send()
            {
                while (true)
                {
                    string text = "";
                    text = Console.ReadLine();
                    buffer = new byte[text.Length];
                    for (int i = 0; i < text.Length; i++)
                    {
                        buffer[i] = (byte)text[i];
                    }
                    Client.BeginSend(buffer, 0, buffer.Length, SocketFlags.None, new AsyncCallback(SendCallBack), null);
                }

            }
            private void SendCallBack(IAsyncResult AR)
            {
                try
                {
                    Client.EndSend(AR);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.ToString());
                }
            }

        }





        static void Main(string[] args)
        {
            AsyncClient AC = new AsyncClient();

        }
    }
}