try
             {
                 server.Connect(ipep);
                 string mes = System.Console.ReadLine();
                 data = Encoding.ASCII.GetBytes(mes);
                 server.SendTo(data, ipep);
             }

  try
             {
                 fullAddress = new IPEndPoint(IPAddress.Any, portInUse);
                 System.Console.WriteLine("Ставим порт " + portInUse + " в режим прослушивания...");
                 mySock.Bind(fullAddress);
                 mySock.Listen(online);
                 Socket client = mySock.Accept();
                 Console.WriteLine("Ожидание соединения… {0}", mySock.LocalEndPoint);
                 mySock.BeginAccept(new AsyncCallback(ReceiveCallback), mySock);
                 string mes = Encoding.ASCII.GetString(clientData);

                 Console.WriteLine(mes);
             }

  string mes = System.Console.ReadLine();
                 server.SendFile(mes);

public void StartAccept(SocketAsyncEventArgs acceptEventArg)
     {
         if (acceptEventArg == null)
         {
             acceptEventArg = new SocketAsyncEventArgs();
             acceptEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(AcceptEventArg_Completed);
         }
         else
         {
             // socket must be cleared since the context object is being reused
             acceptEventArg.AcceptSocket = null;
         }

         m_maxNumberAcceptedClients.WaitOne();
         bool willRaiseEvent = listenSocket.AcceptAsync(acceptEventArg);
         if (!willRaiseEvent)
         {
             ProcessAccept(acceptEventArg);
         }
     }

     // This method is the callback method associated with Socket.AcceptAsync  
     // operations and is invoked when an accept operation is complete
     //
     void AcceptEventArg_Completed(object sender, SocketAsyncEventArgs e)
     {
         ProcessAccept(e);
     }