public MainWindow()
        {
            Connect = new UC_Login();
            Photo   = new UC_Photo();

            InitializeComponent();
            UC_Login my_Login = new UC_Login();

            Window_Container.Children.Add(my_Login);
            btn_Login.Visibility = Visibility.Visible;
        }
        private void Btn_Start_Click(object sender, RoutedEventArgs e)
        {
            Window_Container.Children.Clear();
            btn_Login.Visibility = Visibility.Hidden;
            btn_Start.Visibility = Visibility.Hidden;
            UC_Photo my_Photo = new UC_Photo();

            Window_Container.Children.Add(my_Photo);



            ////Met le fond du LVCanvas comme étant le live preview de la caméra
            //Photo.LVCanvas.Background = bgbrush;
            //MainCamera.StartLiveView();
        }