[ابو ليلى]

انا لا اتعامل مع هذا العنصر كثيراً , لا احبه صراحةً 
اعمل مع Task اكثر قوة و اخف حملاً.

المهم لما لا تضيف  تضيف شيئ من هذا القبيل و تجرب

PHP كود :

public void Watch()
       {
           this.RdrState = new Card.SCARD_READERSTATE();
           readername = GetReadersList()[0];
           this.RdrState.RdrName = readername;

           states = new Card.SCARD_READERSTATE[1];
           states[0] = new Card.SCARD_READERSTATE();
           states[0].RdrName = readername;
           states[0].UserData = 0;
           states[0].RdrCurrState = Card.SCARD_STATE_EMPTY;
           states[0].RdrEventState = 0;
           states[0].ATRLength = 0;
           states[0].ATRValue = null;

           this._worker = new BackgroundWorker();
           this._worker.WorkerSupportsCancellation = true;
           this._worker.DoWork += WaitChangeStatus;
                     _worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
           this._worker.RunWorkerAsync();

       }




void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    BackgroundWorker worker = sender as BackgroundWorker;
    worker.RunWorkerCompleted -= new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
    worker.DoWork -= new DoWorkEventHandler(WaitChangeStatus);
    worker.Dispose();

} 


worker.Dispose ليست ضرورية لانها محققة بشكل افتراضي.