public QuestionnaireViewModel(ScrollItemsViewModel scrollItemsViewModel, Context.IContext context) : base()
        {
            _context = context;
            ScrollVM = scrollItemsViewModel;

            Initialize();

            Questions.CollectionChanged += Questions_CollectionChanged;
            Answers.CollectionChanged   += Answers_CollectionChanged;
            ScrollVM.PropertyChanged    += ScrollItemsViewModel_PropertyChanged;
        }
 public QuestionnaireViewModel(Entity.Questionnaire questionnaire, ScrollItemsViewModel scrollItemsViewModel, Context.IContext context) :
     this(scrollItemsViewModel, context)
 {
     Questionnaire = questionnaire;
 }