异步线程 附属篇2

 class PPSd
    {
        static void Main()
        {
            Console.WriteLine($"当前线程：{Thread.CurrentThread.ManagedThreadId}");
            var ss = new Test().Haha();        
            Console.WriteLine($"curr:{Thread.CurrentThread.ManagedThreadId}");
            Console.WriteLine("最外层");
            Thread.Sleep(1000);
            Console.WriteLine("中间层");
            Console.WriteLine($"结果：{ss.Result}");        

            Console.WriteLine("结束");
        
            Console.Read();
        }
    }


    public class Test
    {
        public async Task Haha()
        {
            Console.WriteLine("走起");
            var dd = await ss();
            Console.WriteLine("里走完外层1");
            Console.WriteLine($"走上面await里面新开线程:{Thread.CurrentThread.ManagedThreadId}");

            var dd2 = await ss();
            Console.WriteLine("里走完外层2");
            Console.WriteLine($"走上面await里面新开线程:{Thread.CurrentThread.ManagedThreadId}");
            return dd;
        }

        public Task ss()
        {
            Thread.Sleep(4000);    
            Console.WriteLine($"走调用ss时的线程:{Thread.CurrentThread.ManagedThreadId}");         
            var dd= Task.Factory.StartNew(() =>
            {
                Thread.Sleep(5000);
                Console.WriteLine($"走新线程:{Thread.CurrentThread.ManagedThreadId}");               
                return 1;
            });
            Console.WriteLine($"走调用ss时的线程:{Thread.CurrentThread.ManagedThreadId}");
            return dd;
        }

    }

结果