C# 控制台 模拟时间一秒一秒走动，直到按Esc键，时间静止，退出！

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading; //延迟函数必备

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            DateTime dt = new DateTime();
            bool ToBeContinue=true;
            while (ToBeContinue)
            {
                ConsoleKeyInfo keyInfo;
                if (System.Console.KeyAvailable)
                {
                    keyInfo = System.Console.ReadKey(true);
                    //if (keyInfo.Key.ToString()=="Enter")//如果按了Enter键
                    if (keyInfo.KeyChar == (char)027)//如果按了Esc键，Esc键的ASCII码为十进制27
                        ToBeContinue = false;
                }
                else//没有按Esc键，时间一秒一秒走动
                {
                    dt = DateTime.Now;//获取当前时间
                    Thread.Sleep(1000);//延迟1秒
                    Console.Clear();
                    Console.WriteLine(dt);
                }
            }
            Console.WriteLine("你已经按了Esc键退出，时间静止！");
            Console.ReadKey();
        }
    }
}