Nice Design Example for a Simple Data Access Layer

If you are in the process of implementing a small data centric application, you'll probably need to write some data access code. I've recently stumbled upon Los Techies, which is a wonderful resource for good programming practices. I especially enjoyed Jimmy Bogard's series on the problem of separation of concerns.

The series is centered towards refactoring an existing solution to a better design, employing well known patterns and practices. But the interesting part is that at the end the result is a nice blue print for a general data access layer based on Linq. And a really good start point if you're trying to build one.

Below are links for the six parts of the series:
Separation of Concerns - how not to do it
Separation of Concerns by example: Part 1
Separation of Concerns by example: Part 2
Separation of Concerns by example: Part 3
Separation of Concerns by example: Part 4
Separation of Concerns by example: Part 5