Republished with Permission - Original Article

Over the last few weeks I've been writing a series of blog posts that cover LINQ to SQL.  LINQ to SQL is a built-in O/RM (object relational mapper) that ships in the .NET Framework 3.5 release, and which enables you to easily model relational databases using .NET classes.  You can use LINQ expressions to query the database with them, as well as update/insert/delete data.

Below are the first three parts of my LINQ to SQL series:

Part 1: Introduction to LINQ to SQL

Part 2: Defining our Data Model Classes

Part 3: Querying our Database

In today's blog post I'll cover how we we can use the data model we created earlier, and use it to update, insert, and delete data.  I'll also show how we can cleanly integrate business rules and custom validation logic with our data model.