public MainWindow()
        {
            InitializeComponent();
            this.Closing += MainWindow_Closing;
            DataContext   = this;
            MonitorPower  = new MonitorPower();

            PowershellFunctions = new Webcam();
            PowershellFunctions.CreateFiles();
            bool isEmpty = PowershellFunctions.isEmpty();

            btnWebcam.IsChecked = (isEmpty == true ? false : true);

            brightness = new Brightness();
            Task task1 = setRadios();

            MySlider.Value     = brightness.getBrightness();
            txtBrightness.Text = MySlider.Value.ToString();
        }