委托回调的异步技术

  static void Main(string[] args)
        {
            //DateTime dt = DateTime.Now;
            //RemoteObject.MyObject app = new RemoteObject.MyObject();
            //Console.WriteLine(app.ALongTimeMethod(1, 2, 1000));
            //Method();
            //Console.WriteLine("用了" + ((TimeSpan)(DateTime.Now - dt)).TotalSeconds + "秒");
            //Console.ReadLine();

            DateTime dt = DateTime.Now;
            //RemoteObject.MyObject app=(RemoteObject.MyObject)Activator.GetObject(typeof(RemoteObject.MyObject),System.Configuration.ConfigurationSettings.AppSettings["ServiceURL"]);
            RemoteObject.MyObject app = new RemoteObject.MyObject();
            md = new MyDelegate(app.ALongTimeMethod);
            AsyncCallback ac = new AsyncCallback(MyClient.CallBack);
            IAsyncResult Iar = md.BeginInvoke(1, 2, 1000, ac, null);
            Method();
            Console.WriteLine("用了" + ((TimeSpan)(DateTime.Now - dt)).TotalSeconds + "秒");
            Console.ReadLine();
        }

        private delegate int MyDelegate(int a, int b, int time);
        private static MyDelegate md;
        public static void CallBack(IAsyncResult Iar)
        {
            if (Iar.IsCompleted)
            {
                Console.WriteLine("结果是" + md.EndInvoke(Iar));
            }
        }
        private static void Method()
        {
            Console.WriteLine("主线程方法开始");
            System.Threading.Thread.Sleep(3000);
            Console.WriteLine("主线程方法结束");
        }