e媒網絡

using System;
using System.Threading;
using System.Threading.Tasks;

namespace AsyncAwaitDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine($"a1,主線程開始,線程Id:{Thread.CurrentThread.ManagedThreadId}");
            TestAsync1();
            Console.WriteLine($"a2,主線程開始,線程Id:{Thread.CurrentThread.ManagedThreadId}");
            Console.ReadKey();
        }
        public static async Task TestAsync1()
        {
            Console.WriteLine($"b1,異步方法開始,線程Id:{Thread.CurrentThread.ManagedThreadId}");
            await  TestAsync2();
            Console.WriteLine($"b2,異步方法開始,線程Id:{Thread.CurrentThread.ManagedThreadId}");
        }
        public static async Task TestAsync2()
        {
            Console.WriteLine($"c1,異步方法開始,線程Id:{Thread.CurrentThread.ManagedThreadId}");
            await Task.Run(()=>
            {
                Thread.Sleep(1000);
                Console.WriteLine($"c2,異步方法執行,線程Id:{Thread.CurrentThread.ManagedThreadId}");
            });
            Console.WriteLine($"c3,異步方法結束,線程Id:{Thread.CurrentThread.ManagedThreadId}");
        }
    }
}