private static void OnUnloadedCommandPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (d is FrameworkElement element && e.NewValue is ICommand command)
{
if (!Unloaded.Contains(element))
{
Unloaded.Add(element);
element.Unloaded += (s, a) =>
{
command.Execute(null);
Loaded.Remove(element);
Unloaded.Remove(element);
};
}
}
}
