Ultrabook Sensors on Desktop App

using System;
using Windows.Devices.Sensors;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Threading;

namespace SensorsUltrabook
{
    public class AmbientLightSensor : SensorBase
    {
        public static readonly DependencyProperty IlluminanceProperty = DependencyProperty.Register(
            "Illuminance",
            typeof (float),
            typeof (AmbientLightSensor),
            new PropertyMetadata(0.0f));

        private readonly LightSensor _lightSensor;

        public AmbientLightSensor()
        {
            _lightSensor = LightSensor.GetDefault();

            if (_lightSensor != null)
            {
                _lightSensor.ReadingChanged += LightSensorReadingChanged;
            }
        }

        public float Illuminance
        {
            get { return (float) GetValue(IlluminanceProperty); }
            protected set { SetValue(IlluminanceProperty, value); }
        }

        private async void LightSensorReadingChanged(LightSensor sender, LightSensorReadingChangedEventArgs args)
        {
           await   this.Dispatcher.BeginInvoke(DispatcherPriority.Normal, (Action)(() =>
                                                                         {
                                                                             LightSensorReading reading = args.Reading;

                                                                             Illuminance = reading.IlluminanceInLux;
                                                                         }));
        }

        protected override void OnReportIntervalChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            _lightSensor.ReportInterval = (uint) ReportInterval;
        }
    }
}