void addPromotion() { try { string name = promotionname_TextBox.Text.ToString(); int type = int.Parse(DropDownList1.SelectedValue.ToString()); string discount = promotiondiscount_TextBox.Text.ToString(); promotions = new PromotionList(); promotions.addPromotion(name, discount, type); } catch (Exception ex) { string error = ex.Message; } finally { this.selectPromotion(); } }