helper1012 1.0.0

private List<Apartments> apartments;
       private readonly HotelManagementEntities db;

       public CatalogWindow()
       {
           InitializeComponent();
           db = new HotelManagementEntities();
           LoadApartments();
       }

       private void LoadApartments()
       {
           apartments = db.Apartments.ToList();
           lvApartments.ItemsSource = apartments;
       }

       private void btnSort_Click(object sender, RoutedEventArgs e)
       {
           string sortBy = (cmbSortBy.SelectedItem as ComboBoxItem)?.Content.ToString();

           switch (sortBy)
           {
               case "Room Number":
                   apartments = apartments.OrderBy(a => a.RoomNumber).ToList();
                   break;
               case "Category":
                   apartments = apartments.OrderBy(a => a.Category).ToList();
                   break;
               case "Price":
                   apartments = apartments.OrderBy(a => a.PricePerNight).ToList();
                   break;
               default:
                   break;
           }
           lvApartments.ItemsSource = apartments;
       }