public IObservable <double> WhenReadingTaken()
{
this.observable = this.observable ?? Observable.Create <double>(ob =>
{
var handler = new EventHandler <LightSensorDataUpdatedEventArgs>((sender, args) =>
ob.OnNext(args.Level)
);
var sensor = new LightSensor
{
Interval = 250
};
sensor.DataUpdated += handler;
sensor.Start();
return(() =>
{
sensor.Stop();
sensor.DataUpdated -= handler;
sensor.Dispose();
});
})
.Publish()
.RefCount();
return(this.observable);
}
