看下组织结构:

System.Object
  System.MarshalByRefObject
    System.Threading.WaitHandle
      System.Threading.Mutex
      System.Threading.Semaphore
      System.Threading.EventWaitHandle
        System.Threading.ManualResetEvent

        System.Threading.AutoResetEvent

 

System.Object

  System.Threading.Interlocked
  System.Threading.Monitor

  System.Threading.ReaderWriterLock

 

1, lock 关键字其实就是对 Monitor 类的 Enter()和 Exit()方法的封装。通过 try......catch......finally 语句块确保在 lock 语句块结束后执行 Monitor.Exit()方法,释放互斥锁。下面2段代码等价:

     

lock(locker)
{
  //do something
}
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