public void SaveInfo() { Category category = CategoryManager.GetCategoryByID(this.CategoryID); if (category != null) { foreach (Discount discount in DiscountManager.GetDiscountsByCategoryID(category.CategoryID)) { DiscountManager.RemoveDiscountFromCategory(category.CategoryID, discount.DiscountID); } foreach (int discountID in DiscountMappingControl.SelectedDiscountIDs) { DiscountManager.AddDiscountToCategory(category.CategoryID, discountID); } } }