private void AttachNotifyChangeEvent(IEnumerable views)
{
foreach (var view in views)
{
var dependencyObject = view as DependencyObject;
if (dependencyObject != null)
{
ObservableObject<object> viewRegionContext = RegionContext.GetObservableContext(dependencyObject);
viewRegionContext.PropertyChanged += this.ViewRegionContext_OnPropertyChangedEvent;
}
}
}