Thread.sleep代码（500）将迫使当前线程等待500毫秒。它的工作原理，但它不是你想要的，如果你的整个应用程序在一个线程中运行。

Thread.Sleep(500) will force the current thread to wait 500ms. It works, but it's not what you want if your entire application is running on one thread.

在这种情况下，你需要使用一个定时器，就像这样：

In that case, you'll want to use a Timer, like so:

using System.Timers;

void Main()
{
    Timer t = new Timer();
    t.Interval = 500; //In milliseconds here
    t.AutoReset = true; //Stops it from repeating
    t.Elapsed += new ElapsedEventHandler(TimerElapsed);
    t.Start();
}

void TimerElapsed(object sender, ElapsedEventArgs e)
{
    Console.WriteLine("Hello, world!");
}

您还可以设置自动复位为假（或不设置的话），如果你希望计时器重演。

You can also set AutoReset to false (or not set it at all) if you want the timer to repeat itself.