static void BindingsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FrameworkElement target = (FrameworkElement)d;
BindingsInfoCollection bindings = (BindingsInfoCollection)e.NewValue;
bindings.TopElement = target;
}
public static void SetBindings(FrameworkElement target, BindingsInfoCollection bindings)
{
target.SetValue(BindingsProperty, bindings);
}