private async void getServiceAndCombo() { myAPI = RestService.For <IMyAPI>("https://goldenspa.azurewebsites.net"); var maCN = Intent.GetStringExtra("OutletId"); var resultService = await myAPI.GetServiceFromOutlet(maCN); var resultCombo = await myAPI.GetComboFromOutlet(maCN); var max = resultService.Count + resultCombo.Count; mService_List = new List <ListService>(max); for (int i = 0; i < resultService.Count; i++) { var DataSample_Services_Outlet_ViewModel = new ListService(); DataSample_Services_Outlet_ViewModel.MaDV = resultService[i].MaDV; DataSample_Services_Outlet_ViewModel.Image = resultService[i].Image; DataSample_Services_Outlet_ViewModel.NameService = resultService[i].NameService; DataSample_Services_Outlet_ViewModel.price = resultService[i].price; DataSample_Services_Outlet_ViewModel.Discount = resultService[i].Discount; mService_List.Add(DataSample_Services_Outlet_ViewModel); } for (int i = resultService.Count; i < max; i++) { var DataSample_Services_Outlet_ViewModel = new ListService(); DataSample_Services_Outlet_ViewModel.MaDV = resultCombo[i - resultService.Count].MaDV; DataSample_Services_Outlet_ViewModel.Image = resultCombo[i - resultService.Count].Image; DataSample_Services_Outlet_ViewModel.NameService = resultCombo[i - resultService.Count].NameService; DataSample_Services_Outlet_ViewModel.price = resultCombo[i - resultService.Count].price; DataSample_Services_Outlet_ViewModel.Discount = resultCombo[i - resultService.Count].Discount; mService_List.Add(DataSample_Services_Outlet_ViewModel); } mAdapterService = new Outlet_Service_Customer_Adapter(mService_List); mRecyclerViewService.SetAdapter(mAdapterService); }