using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConsoleApplication1{    class Program    {        # region 主程序        static void Main(string[] args)        {            // 一行注释            Console.WriteLine("Hello C#!");            Console.ReadKey();        }        #endregion        #region 其他程序        public void test()        {        }        #endregion        }}