c#异步之Task

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

        //task->async异步方法和await，主线程碰到await时会立即返回，继续以非阻塞形式执行主线程下面的逻辑

        /// <summary>
        /// 测试Task添加异步方法
        /// </summary>
        public async void TestAsyncShow()
        {
            Console.WriteLine("异步Show方法开始=====");
            await Task.Run(() =>
            {
                TestMethods.Show(Uname);
            });
            Console.WriteLine("异步Show方法结束=====。");
        }

        /// <summary>
        /// 测试Task添加异步方法
        /// </summary>
        public async void TestAsyncPlus()
        {
            Console.WriteLine("异步Add方法开始=====");

            //Task异步调用方法获取返回值方法1
            int result1 = await TestAsyncPlusCallBack();
            Console.WriteLine("异步Add方法相加结果1：" + Convert.ToString(result1));

            //Task异步调用方法获取返回值方法1
            var result2 =await Task.Run(() => { 
              return TestMethods.Add(Num1, Num2);
            });
            Console.WriteLine("异步Add方法相加结果2：" + Convert.ToString(result2));
            Console.WriteLine("异步Add方法结束=====。");
        }

        /// <summary>
        /// 测试Task添加异步处理及返回参数方法
        /// </summary>
        /// <param name="result"></param>
        private async Task<int> TestAsyncPlusCallBack()
        {
            int result = 0;
            await Task.Run(() => {
                result = TestMethods.Add(Num1, Num2);
            });
            return result;
        }
    }