private IObservable <PnpEventArgs> CreateWhenPnp()
{
return(Observable.FromEvent(
(Action <PnpEventArgs> handler) =>
new _ICoreScannerEvents_PNPEventEventHandler(
delegate(Int16 eventType, ref String data)
{
handler(PnpEventArgs.Parse(eventType, data));
}),
handler => this.coreScanner.PNPEvent += handler,
handler => this.coreScanner.PNPEvent -= handler));
}
