private async Task GetContactsAsync() { var _restService = new RESTService(); var result = await _restService.GetClientsAsync(); if (result.Item1 == true) { var json = result.Item2; if (DataStore.GetDataStoredJson("Contacts").ToList().Count > 0) { DataStore.UpdateData("Contacts", json); } else { var Data = new Stored_Data_Model { Type = "Contacts", json = json }; DataStore.AddData(Data); } UpdateContactsListview(); } else { DependencyService.Get <IMessage>().ShortAlert(result.Item2); } }