private static void AttachChanged(object dependencyObject, DependencyPropertyChangedEventArgs e)
{
dependencyObject.DbC_Assure(value => value is FrameworkElement || value is FrameworkContentElement, "Attach can only be used on Framework(Content)Element");
if (e.OldValue is INotifyPropertyChanged)
{
INotifyPropertyChanged EventSource = (INotifyPropertyChanged)e.OldValue;
EventConnector.GetEventConnector(EventSource).RemoveTarget((DependencyObject)dependencyObject);
}
if (e.NewValue is INotifyPropertyChanged)
{
INotifyPropertyChanged EventSource = (INotifyPropertyChanged)e.NewValue;
EventConnector.GetEventConnector(EventSource).AddTarget((DependencyObject)dependencyObject);
}
}
