static void Main(string[] args)
        {
            Console.WriteLine("Hello Server!");
            DoctorPasswordData.Init();
            AllClients.Init();
            Listener = new TcpListener(IPAddress.Any, 15243);
            Listener.Start();
            Listener.BeginAcceptTcpClient(new AsyncCallback(OnConnect), null);

            Console.ReadLine();

            while (true)
            {
            }
        }