private void Initialize() { List <StoreItem> items = MainFunctions.GetStoreFoodTypes(MainFunctions.Main.ShopId, MainFunctions.Main.MainLanguage); List <StoreItem> duplicated = items.GroupBy(s => s.Name).SelectMany(s => s.Skip(1)).ToList(); foreach (var item in duplicated) { items.Remove(item); } TypeList.ItemsSource = items.ToArray(); }