public async Task Update(int id) { if (IDUser != 0 && IDCompitention != 0 && Autentification_CheckBox.IsChecked) { bool verifi = false; if (Autentification_CheckBox.IsChecked) { verifi = true; } else { verifi = false; } Participation participation = new Participation { IdParticipation = id, IdCompetentions = IDCompitention, IdUser = IDUser, IdStatusVerification = verifi }; await participationService.Update(participation); await Navigation.PopModalAsync(); } else { if (!await DisplayAlert("Ошибка", "Вы заполнили не все поля", "Заполнить", "Выйти")) { await Navigation.PopModalAsync(); } } }