WMI and Quota violation exception

[Dilip]

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 = WatchForProcess Death())
{
WaitHandle.Wait One(thisEvent);
}
}

private AutoResetEvent WatchForProcess Death()
{
AutoResetEvent evt = new AutoResetEvent( false);
string newQry =
"select * from __InstanceDelet ionEvent within 2 where
TargetInstance ISA 'Win32_Process' and " +
"TargetInstance .Name = 'MyProcess.exe' ";
ManagementEvent Watcher mew = new ManagementEvent Watcher(@"\\.\r oot
\CIMV2", newQry);
mew.EventArrive d += 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.Manageme ntException on the Start() method of
ManagementEvent Watcher.

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
ManagementEvent Watcher 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!)