private void ShowVariants() { List <BLProduct> variantList = BLProduct.RetrieveVariantsOfProductFromDB(connectionString, product.Id); DropDownVariants.Items.Clear(); ListItem selectedProduct = new ListItem(productTitle.InnerText, product.Id.ToString()); DropDownVariants.Items.Add(selectedProduct); foreach (BLProduct variant in variantList) { ListItem item = new ListItem(variant.Name, variant.Id.ToString()); DropDownVariants.Items.Add(item); } }