private void btn_deleteProducer_Click(object sender, RoutedEventArgs e) { producerType = list_Catalogs.SelectedItem as wsProducerType; if (producerType != null) { wc.ws_checkProducerAsync((int)producerType.ProducerID); } else { InfoWindow iw = new InfoWindow(Messages.m_Message, "Не выбран элемент для удаления"); iw.Show(); } }