防止线程退出的几种方案-不再while(true)

有时候 调试程序的时候 。我们需要防止程序退出。比如调试一个定时服务。

方法1 while(true) {Thread.Sleep(1000)}

方法 2——（推荐） Well when you do that with Thread.Sleep(1000), your processor wastes a tiny amount of time to wake up and do nothing.

You could do something similar with CancelationTokenSource.

When you call WaitOne(), it will wait until it receives a signal.

CancellationTokenSource cancelSource = new CancellationTokenSource();

public override void Run()
{
    //do stuff
    cancelSource.Token.WaitHandle.WaitOne();
}

public override void OnStop()
{
    cancelSource.Cancel();
}

方法3 

An alternative approach may be using an AutoResetEvent and instantiate it signaled by default.

public class Program
{
     public static readonly AutoResetEvent ResetEvent = new AutoResetEvent(true);

     public static void Main(string[] args)
     {
          Task.Factory.StartNew
          (
               () =>
               {
                   // Imagine sleep is a long task which ends in 10 seconds
                   Thread.Sleep(10000);

                   // We release the whole AutoResetEvent
                   ResetEvent.Set();
               }
          );

          // Once other thread sets the AutoResetEvent, the program ends
          ResetEvent.WaitOne();
     }
}