LINQ to SQL - Part 4

Here's another link from Guthrie's series about Link to SQL.

Apart from the usual demo, I particularly liked:

• Custom Entity Insert/Update/Delete Method Validation (add validation logic that is specific to insert, update or delete scenarios)
• Custom Property Validation Support (OnPropertyChanged)
• Custom Entity Object Validation Support (OnValidate)

To some extent, seems like some of Lhotka's CSLA.NET concepts are represented here.