Hi

I am using the following WMI code to watch for the termination of a
particular process.  This code is running under Windows Vista.

public void WaitForDeath()
{
  using (AutoResetEvent thisEvent = WatchForProcessDeath())
  {
     WaitHandle.WaitOne(thisEvent);
  }
}

private AutoResetEvent WatchForProcessDeath()
{
  AutoResetEvent evt = new AutoResetEvent(false);
  string newQry =
            "select * from __InstanceDeletionEvent within 2 where
TargetInstance ISA 'Win32_Process' and " +
            "TargetInstance.Name = 'MyProcess.exe'";
  ManagementEventWatcher mew = new ManagementEventWatcher(@"\\.\root
\CIMV2", newQry);
  mew.EventArrived += delegate {  evt.Set(); };
  mew.Start();
  return evt;
}

Our QA folks tested this functionality by calling WaitForDeath()
repeatedly in a tight loop.  at some point, say after 3 hours or so,
we started getting a "Quota violation" exception of type
System.ManagementException on the Start() method of
ManagementEventWatcher.

I happened upon some posts related to this on the WMI newsgroup but I
am not clear how to solve this in my case.

1) Is this happening because of the query itself?  If so, why does it
happen only after 3 hours and not right away?
2) Is this happening because I am not properly disposing of the
ManagementEventWatcher objects?  In the EventArrived event I could
add:

mew.Stop();
mew.Dispose();

in addition to setting the autoreset event.  I just don't know enough
about WMI to decide if it would help.

Can anyone help? (From past experience I really hope Mr. Willy
Denoyette sees this!)