public DriverViewModel() { Drivers = new ObservableRangeCollection <Driver>(); LoadTrucksCommand = new Command(() => ExecuteLoadTrucksCommand()); DeleteCommand = new Command(() => ExecutedeleteCommand()); MessagingCenter.Subscribe <NewDriverPage, Driver>(this, "AddItem", async(obj, driver) => { var _driver = driver as Driver; Drivers.Add(_driver); await DriverStore.AddDriverAsync(_driver); }); }