private static void MyIsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
{
if (sender is UserControl c)
{
IVisibilityChanged f = GetVisibilityActionChanged(c);
if (f != null)
{
if ((bool)e.NewValue)
{
f.Showing();
}
else
{
f.Hiding();
}
}
}
}
public static void SetVisibilityActionChanged(DependencyObject sender, IVisibilityChanged value) => sender.SetValue(VisibilityActionChangedProperty, value);
