C# lock,monitor,enter,tryenter,lockTaken

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class ThreadSafe {     static readonly object _locker = new object();     static int _val1 = 1, _val2 = 1;       static void Go()     {         lock(_locker)         {             if(_val2!=0)             {                 Console.WriteLine(_val1 / _val2);             }             _val2 = 0;         }     }       static void MonitorEnterExit()     {         Monitor.Enter(_locker);         try         {             if(_val2!=0)             {                 Console.WriteLine(_val1 / _val2);             }             _val2 = 2;         }         finally         {             Monitor.Exit(_locker);         }     }       bool lockTaken = false;     void MonitorEnterRefLockTaken()     {         try         {             Monitor.Enter(_locker, ref lockTaken);         }        finally         {             if(lockTaken)             {                 Monitor.Exit(_locker);             }         }     }       void MonitorTryEnterLockTaken()     {         Monitor.TryEnter(_locker,1000,ref lockTaken);         Monitor.Exit(_locker);     } }

　　

 

The lock is sugar syntact of Monitor,Enter,TryEnter,with timespan and lockTaken,then Monitor.Exit();