异步编程学习

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 异步
{
    class Program
    {
         static void Main(string[] args)
        {
            MethodAsync();
           // Console.WriteLine(Greeting("456"));
            Console.ReadKey();
        }
        public static string  Greeting(string name)
        {
            System.Threading.Thread.Sleep(5000);
            //Console.WriteLine("我是休眠的进程苏醒了，哈哈");
            return $"hello,我是{name}";
        }
        public static Task<string>  GreetingAsync(string name)//调用异步方法时，需要用await
        {
          return Task.Run<string>(() => { return Greeting(name); }
            );
        }
        public async static void MethodAsync()
        {
        string str = await GreetingAsync("123");
        Console.WriteLine(str);//过了5s执行该方法
        }
    }
}