The presentation made available for download through this post is in swedish. The code however is “international”. First of I would like to list what I think are two of the best getting started with LINQ resources available online.
The free e-book Introducing Microsoft LINQ
All the MSDN Nuggets of Microsoft UK, but specifically Decomposing LINQ by Daniel Moth that is the best C# 3.0 / LINQ features demo I have ever seen to date. Enough so that I used the approach introduced in my own demo.
With that said, the material provided here is the LINQ presentation and demo code that I used for the LINQ presentation I held.
Presentation: The mechanics of LINQ.pptx (in swedish)
Code: linqdemo.zip
Be Logical - Notes from Johan Hedberg 