private async Task ExecuteOnGetHistory() { IsBusy = true; var _restService = new RESTService(); var Result = await _restService.GetClientsHistoryAsync(Contact._id); if (Result.Item1) { var contact = JsonConvert.DeserializeObject <ContactVisiteHistory_Model>(Result.Item2); contact.client = Contact; await Navigation.PushModalAsync(new ContactHistory_View(contact), true); } else { DependencyService.Get <IMessage>().ShortAlert(Result.Item2); } IsBusy = false; }