private void MenuItem_Click(object sender, RoutedEventArgs e)
        {
            base.OnSourceInitialized(e);
            var hwnd = new WindowInteropHelper(this).Handle;

            WindowsServices.SetWindowExTransparent(hwnd);
        }
        protected override void OnSourceInitialized(EventArgs e)
        {
            base.OnSourceInitialized(e);
            var hwnd = new WindowInteropHelper(this).Handle;

            WindowsServices.SetWindowExTransparent(hwnd);
        }
        private void Menu_Open(object sender, RoutedEventArgs e)
        {
            base.OnSourceInitialized(e);
            var hwnd = new WindowInteropHelper(this).Handle;

            WindowsServices.makeNormal(hwnd);
        }