10 Ways to Improve the Performance of Your WPF Application

Windows Presentation Foundation (WPF) applications are often classified as applications that are resource hungry, and yes they are. However, you can still improve their performance to a greater extent by following few techniques that we'll examine in this tutorial.
http://www.codeguru.com/csharp/.net/article.php/c18025

.NET Framework 4.0 Task Parallel Library BlockingCollection

Learn how BlockingCollection, a new .NET Framework 4.0 concurrency friendly data structure, can serve as a mediator between task classes sharing data

http://www.codeguru.com/columns/experts/article.php/c18027

cheers
samitha