System.Threading.ReaderWriterLockSlim.WaitOnEvent C# (CSharp) Method

		bool WaitOnEvent (EventWaitHandle waitEvent, ref uint numWaiters, int millisecondsTimeout)
		{
			Debug.Assert (MyLockHeld);

			waitEvent.Reset ();
			numWaiters++;

			bool waitSuccessful = false;

			// Do the wait outside of any lock 
			ExitMyLock();      
			try {
				waitSuccessful = waitEvent.WaitOne (millisecondsTimeout, false);
			} finally {
				EnterMyLock ();
				--numWaiters;
				if (!waitSuccessful)
					ExitMyLock ();
			}
			return waitSuccessful;
		}