There is a sample chapter from my upcoming book on all things performance related within the Microsoft platform. Specifically, the book will be about performance testing, profiling and optimisation for web and desktop applications developed using Microsoft.NET.
This sample chapter is just a teaser and the book itself goes into great detail about how to setup a performance test rig using Visual Studio, how to record, manage and analyse performance metrics, and what you can change to make your apps fly.
Anyways, the sample chapter is located here.
( http://www.simple-talk.com/dotnet/performance/understanding-performance-profiling-targets/ )
Hope you like it.