Performance Performance Performance
Personally I like understanding the inners of the GC, how to write fast code, and the implications of using certain language features. If you have a similar interest you may find the following postings useful:

Personally I like understanding the inners of the GC, how to write fast code, and the implications of using certain language features. If you have a similar interest you may find the following postings useful:
There is a great PDC video on WPF performance: http://microsoftpdc.com/Sessions/CL11, from memory that also goes into the Windows Performance Toolkit (WPT) that comes with the win 7 SDK (there is also a PDC vid on that http://microsoftpdc.com/Sessions/CL16).