// called when 'Background' property changed
static void BackgroundChangedCallback(DependencyObject property, DependencyPropertyChangedEventArgs args)
{
StandardWindow window = (StandardWindow)property;
window._contentWindowBackgroundBorder.Background = (Brush)args.NewValue;
}
// called when 'Content' property changed
static void ContentChangedCallback(DependencyObject property, DependencyPropertyChangedEventArgs args)
{
StandardWindow window = (StandardWindow)property;
window._contentWindowBorder.Child = (UIElement)args.NewValue;
}
