Rating: 

I was very pleased with all the code samples, though the editor needs a slight slap on the wrists. There were quite a few examples with misspellings (clock instead of Clock, just off the top of my head) that would make replicating the examples a little painful to the reader. Not a huge deal, but for a more inexperienced programmer it could be.

Overall, it was an excellent foray into the world of C# for me, since I consider myself a newbie to C#. Thanks O'Reilly!