public async Task Refresh() { var items = await ShoppingListService.GetShoppingListToShopItems(); ListItems = items.Select(i => new SelectableShoppingListItem(i)).ToList(); UnCheckedListItems = ListItems.Where(li => !li.Item.IsChecked).ToList(); CheckedListItems = ListItems.Where(li => li.Item.IsChecked).ToList(); StateHasChanged(); }