async void ExecuteLoadTrucksCommand() { if (IsBusy) { return; } IsBusy = true; try { Trucks.Clear(); var trucks = await TruckStore.GetTrucksAsync(true); Trucks.ReplaceRange(trucks); } catch (Exception ex) { Debug.WriteLine(ex); MessagingCenter.Send(new MessagingCenterAlert { Title = "Error", Message = "Unable to load Trucks.", Cancel = "OK" }, "message"); } IsBusy = false; }