public void Updatelist() { api Listapi = new api(); List <Shoppinglist> userShoppinglists = new List <Shoppinglist>(); userShoppinglists = Listapi.GetShoppinglists(GlobalSettings.Id); if (userShoppinglists != null) { foreach (var shoppinglist in userShoppinglists) { shoppinglists.Items.Add(shoppinglist); } } }