# Example: a Product DAO

A complete ProductDao for Northwind, with methods to get, search, add, update and delete products, all with parameters and one mapping method.

![Cheat sheet: Example: a Product DAO](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/8afa04db6fdb4ca1bf910d2590946e12.webp)

- Category: C#
- Level: Journeyman
- Tags: CRUD, c-sharp, Data Access Object (DAO), DBNull, t-sql
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/mapping-data-to-models-in-csharp-example-a-product-dao-cheat-sheet