public async Task <ObservableCollection <Contact> > Contacts() { try { var result = await ObjClient.PhonebookContactsGetAsync(new CancellationToken()); return(result); } catch (HttpRequestException ex) { ObjSuccessfulAnswer = new SuccessfulAnswer() { TitleMessage = "Ops, erro ao listar o cadastro!", Message = ex.Message, Success = false }; return(null); } catch (SwaggerException ex) { ObjSuccessfulAnswer = new SuccessfulAnswer() { TitleMessage = "Ops, erro ao lista o cadastro!", Message = JsonConvert.DeserializeObject <SuccessfulAnswer>(ex.Response).Message, Success = false }; return(null); } }