private void EditButton_Click(object sender, RoutedEventArgs e)
        {
            var EditApartmentWindow = new ApartmentItem(ApartmentsDataGrid.SelectedItem as Apartments);

            if (EditApartmentWindow.ShowDialog() == true)
            {
                ApartmentsListView = Core.DB.Apartments.ToArray();
            }
        }
        private void AddButton_Click(object sender, RoutedEventArgs e)
        {
            var NewApartmentWindow = new ApartmentItem(new Apartments());

            if (NewApartmentWindow.ShowDialog() == true)
            {
                ApartmentsListView = Core.DB.Apartments.ToArray();
            }
        }