public void OnCardError(object sender, CardEventArgs <string> e)
        {
            EventHandler <CardEventArgs <string> > handler = SmartCardErrorEventHandler;

            if (handler != null)
            {
                handler(this, null);
            }
        }
        public void OnCardInserted(object sender, CardEventArgs <string> e)
        {
            EventHandler <CardEventArgs <string> > handler = SmartCardInsertEventHandler;

            if (handler != null)
            {
                handler(this, e);
            }
        }