C# 异步执行示例（Task）

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

namespace LdTest
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("开始 ..");

            // 异步调用
            Task<int> AA = Task.Run(() =>
            {
                return Test(111);
            });
            Task<int> BB = Task.Run(() =>
            {
                return Test(222);
            });
            AA.Wait(); // 等待异步完成
            BB.Wait(); // 等待异步完成

            Console.WriteLine("结束 ..");
            while (true)
            {
                Thread.Sleep(300);
            }
        }

        private static int Test(int id)
        {
            for (var i = 0; i < 10; i++)
            {
                Console.WriteLine($"{id} => {i}");
                Thread.Sleep(1);
            }
            return 0;
        }

    }
}