public static void UnregisterScannerActivity()
{
try
{
ElContext?.UnregisterReceiver(Receiver);
}
catch { }
AfterReceive?.GetInvocationList().ToList().ForEach(x => AfterReceive -= (EventHandler <ReceiveEventArgs>)x);
BeforeReceive?.GetInvocationList().ToList().ForEach(x => BeforeReceive -= (EventHandler)x);
ElContext = null;
ARP = null;
}
