private static void Receive_Callback(IAsyncResult ar)
        {
            Socket socket = (Socket)ar.AsyncState;
            int    read   = socket.EndReceive(ar);


            recBuf  found   = Receive_buffers.Find(item => item.socket == socket);
            Message message = new Message();

            found.messages.Add(message);
            message.text = new byte[BuffSize];

            socket.BeginReceive(message.text, 0, BuffSize, SocketFlags.None, Receive_Callback, socket);
        }
        private static void Accept_Callback(IAsyncResult ar)
        {
            Socket socket;

            socket = Server_socket.EndAccept(ar);
            if (new Form2((IPEndPoint)socket.RemoteEndPoint).ShowDialog() == DialogResult.Yes)
            {
                Clients_sockets.Add(socket);
                recBuf Receive_buffer = new recBuf(socket);
                Receive_buffers.Add(Receive_buffer);

                Message message = new Message();
                Receive_buffer.messages.Add(message);
                message.text = new byte[BuffSize];

                socket.BeginReceive(message.text, 0, BuffSize, SocketFlags.None, Receive_Callback, socket);
            }
            else
            {
                socket.Shutdown(SocketShutdown.Both);
                socket.Close();
            }
            Server_socket.BeginAccept(Accept_Callback, null);
        }