public AddOrderWindow(IAddOrderViewModel addOrderViewModel, IAddItemWindow addItemWindow)
        {
            AddOrderViewModel = addOrderViewModel;
            AddItemWindow     = addItemWindow;

            this.DataContext = AddOrderViewModel;

            InitializeComponent();

            AddOrderViewModel.AddObserverListView(ItemsListView);
        }
        public AddOrderWindow(IAddOrderViewModel addOrderViewModel, IAddItemWindow addItemWindow)
        {
            AddOrderViewModel = addOrderViewModel;
            AddItemWindow = addItemWindow;

            this.DataContext = AddOrderViewModel;

            InitializeComponent();

            AddOrderViewModel.AddObserverListView(ItemsListView);
        }