[.net 多线程]ThreadPool

 CancellationTokenSource tocken = new CancellationTokenSource();
 ThreadPool.QueueUserWorkItem(param => {
     Console.WriteLine($"当前线程【{Thread.CurrentThread.ManagedThreadId}】");
     Thread.Sleep();
     Console.WriteLine($"当前线程【{Thread.CurrentThread.ManagedThreadId}】退出");
 }, tocken);

两种出发模式：定时8s出发，事件触发器出发（autoresetevent）

 AutoResetEvent evt = new AutoResetEvent(false);
 ThreadPool.RegisterWaitForSingleObject(evt, (state, isOut) =>
 {
     CancellationTokenSource token = (CancellationTokenSource)state;
     if (tocken.IsCancellationRequested)
     {
         Console.WriteLine("退出RWFS");
         return;
     }
     Console.WriteLine("RWFS...");
 }, tocken, , false);