<START geek mode>
I've been waiting a while to get hold of this book and I have to say the wait was worth it. Written by BradA and Krzysztof Cwalina it is a great insight into the way Microsoft approach building their development frameworks. The great thing about this book is that it will guide you in the best practices of writing code, so whether you're writing the next .Net framework or just building a custom control for your blog you can get real gain from reading this. Another very nice addition to the book is the comments that sit alongside the authors text. People like Jeff Richter and Paul Vick add there 2 pennies worth from their real world experiences. It's very compelling content and highly recommended.
</END geek mode>
Buy it from Amazon