c#异步之委托

 public class TestDelegate
    {
       private  string Uname = "joyet";
       private  int Num1 = 109;
       private  int Num2 = 5;
       private  int Num3=0;

       /// <summary>
       /// 测试同步方法
       /// </summary>
       public  void TestYncMethod()
       {
           Console.WriteLine("同步Show方法开始=====");
           DelegateShow showDelegate = new DelegateShow(TestMethods.Show);
           showDelegate.Invoke(Uname);
           Console.WriteLine("同步Show方法结束=====。");
           Console.WriteLine("同步Add方法开始=====");
           DelegatePlus plusDelegate = new DelegatePlus(TestMethods.Add);
           int addResult = plusDelegate.Invoke(Num1, Num2);
           Console.WriteLine("同步Add方法相加结果：" + Convert.ToString(addResult));
           Console.WriteLine("同步Add方法结束=====。");
       }

       public  void TestAsyncShow()
       {
           Console.WriteLine("异步Show方法开始=====");
           DelegateShow showDelegate = new DelegateShow(TestMethods.Show);
           showDelegate.BeginInvoke(Uname,null,null);
           //异步操作返回,当主线程运行到EndInvoke时，如果这时调用没有结束（这种情况很可能出现），这时为了等待调用结果，线程依旧会被阻塞
           showDelegate.EndInvoke(null);
           Console.WriteLine("异步Show方法结束=====。");
       }

       public  void TestAsyncPlus()
       {
           Console.WriteLine("异步Plus方法主线程开始=====");
           DelegatePlus plusDelegate = new DelegatePlus(TestMethods.Add);
           IAsyncResult result = plusDelegate.BeginInvoke(Num1, Num2, new AsyncCallback(TestAsyncPlusCallBack), "AsycState:OK");
           Console.WriteLine("异步Plus方法主线程结束=====。");
       }

       /// <summary>
       /// 异步回调用回调函数，当调用结束时会自动调用回调函数，解决了为等待调用结果，而让线程依旧被阻塞的局面。
       /// </summary>
       /// <param name="result"></param>
       private  void TestAsyncPlusCallBack(IAsyncResult result)
       {
           DelegatePlus handler = (DelegatePlus)((AsyncResult)result).AsyncDelegate;
           Num3=handler.EndInvoke(result);
           Console.WriteLine("异步Add方法相加结果：" + Convert.ToString(Num3));
       }
    }

 public class TestMethods
    {
       public static void Show(string uname)
       {
           Thread.Sleep(3000);
           Console.WriteLine("Your name is :" + uname);
       }

       public static int Add(int a, int b)
       {
           Thread.Sleep(3000);
           return a + b;
       }
    }