c# 异步之Func

 public class TestFunc
    {
        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Add方法开始=====");
            Func<int,int,int> func = TestMethods.Add;
            func.Invoke(Num1, Num2);
            Console.WriteLine("同步Add方法结束=====。");
        }

        /// <summary>
        /// 测试异步方法
        /// </summary>
        public void TestAsyncPlus()
        {
            Console.WriteLine("异步Add方法开始=====");
            Func<int,int,int> func = TestMethods.Add;
            IAsyncResult result = func.BeginInvoke(Num1, Num2, new AsyncCallback(TestAsyncPlusCallBack), null);
            Console.WriteLine("异步Add方法结束=====。");
        }

        /// <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)
        {
            Func<int, int, int> f = (Func<int, int, int>)((AsyncResult)result).AsyncDelegate;
            Num3 = f.EndInvoke(result);
            Console.WriteLine("异步Add方法相加结果：" + Convert.ToString(Num3));
        }
    }