PerformanceCounter somehow locks my dll...

Hi,

I use this code from a Windows service:

using (var c = new PerformanceCounter("Process", Working Set", instance, true))
   return c.RawValue;

Which Works, no problems. The problems come when I shutdown the Windows service. My dll is locked for 4 seconds or so, after the service has shut Down. If I remove the PerformanceCounter lines I can delete the dll right after service shutdown.

Is this normal?

--
Werner