private void FormService_Load(object sender, EventArgs e) { if (id.HasValue) { try { ServiceViewModel view = service.GetElement(id.Value); if (view != null) { textBoxName.Text = view.ServiceName; textBoxPrice.Text = view.Price.ToString(); serviceDrugs = view.ServiceDrugs; LoadData(); } } catch (Exception ex) { MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error); } } else { serviceDrugs = new List <ServiceDrugViewModel>(); } }