public Auswertung(Ui ui, ObservableCollection<Category> classes)
        {
            InitializeComponent();

            _ui = ui;
            DataContext = classes;
        }
 public Befragen(Ui ui)
 {
     _ui = ui;
     InitializeComponent();
 }
        public Auswertung(Ui ui)
        {
            InitializeComponent();

            _ui = ui;
        }
 public Befragen(Ui ui)
 {
     _ui = ui;
     InitializeComponent();
 }