private static void OnSelectedObjectsChanged(DependencyObject depobj, DependencyPropertyChangedEventArgs evargs)
{
SelectionListBox SelListBox = depobj as SelectionListBox;
SelListBox.ResetSelection(evargs.NewValue as IList);
}
public SelectableContainer(SelectionListBox Parent, object Content)
{
this.Parent = Parent;
this.Content = Content;
}