private static void MultiThreadSynergicWithSemaphore()
  {
   //0表示創(chuàng)建Semaphore時(shí)，擁有可用信號(hào)量數(shù)值
   //1表示Semaphore中，最多容納信號(hào)量數(shù)值
   Semaphore semaphore = new Semaphore(0, 1);


   Thread thread1 = new Thread(() =>
   {
    //線程首先WaitOne等待一個(gè)可用的信號(hào)量
    semaphore.WaitOne();
    //在得到信號(hào)量后，執(zhí)行下面代碼內(nèi)容
    Console.WriteLine("thread1 work");
    Thread.Sleep(5000);
    //線程執(zhí)行完畢，將獲得信號(hào)量釋放（還給semaphore）
    semaphore.Release();
   });


   Thread thread2 = new Thread(() =>
   {
    semaphore.WaitOne();
    Console.WriteLine("thread2 work");
    Thread.Sleep(5000);
    semaphore.Release();
   });
   thread2.Start();
   thread1.Start();
   //因在創(chuàng)建Semaphore時(shí)擁有的信號(hào)量為0
   //semaphore.Release(1) 為加入1個(gè)信號(hào)量到semaphore中
   semaphore.Release(1);
  }