The threads are only moved when their wait time-out has expired.
In your sample you pulse the threads before their wait time-out have expired
so their schedule order remains unchanged. If you wait a bit before you
pulse you'll see what I mean.

   new Thread(new ParameterizedThreadStart(ShortTimeout)).Start(Lock);
   Thread.Sleep(2000);
   lock (Lock)
       Monitor.Pulse(Lock);

Or change you code like this ...

           Thread.Sleep(500);
           lock (Lock)
......
       }

       static void NoTimeout(object Lock)
       {
           lock (Lock)
           {
               Monitor.Wait(Lock);
...
       static void ShortTimeout(object Lock)
       {
           lock (Lock)
           {
               bool Locked = Monitor.Wait(Lock, 300);
...
       static void LongTimeout(object Lock)
       {
           lock (Lock)
           {
               bool Locked = Monitor.Wait(Lock, 600);
...

Willy.

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