public static void registerInTimer50(IEventHandlerTimer hndl)
 {
     lock (mtxHndl50)
     {
         mHandlers50.Add(hndl);
     }
 }
 public static void unregisterInTimer100(IEventHandlerTimer hndl)
 {
     lock (mtxHndl100)
     {
         mHandlers100.Remove(hndl);
     }
 }