Dynamic .NET:  Understanding the Dynamic Keyword in C# 4
The dynamic keyword brings exciting new features to C# 4. We'll show you how it works and why it simplifies a lot of your coding tasks, including some handy COM interop possibilities.
Alexandra Rusina

Dynamic Data: Pattern Matching Database Records with F#
When migrating data from other sources into a single database used by your app, you'll probably have to employ some matching and de-duplication processes to end up with a useful data store. We'll show you four different matching algorithms and the F# code to implement them.
Ambar Ray

Parallel Computing: It's All About the SynchronizationContext
SynchronizationContext is a class (and concept) that is central to the correct operation of multithreaded components on .NET, but is often overlooked or misunderstood.
Steve Cleary

Business Connectivity Services: Managing Employee Rewards with Office and SharePoint BCS
How can you use parallel coding techniques to squeeze the utmost performance out of multi-core systems when processing data? There are many different approaches, but we show you the absolute best.
Ying Xiong

Data Contract Inheritance: Known Types and the Generic Resolver
Developers often struggle with the hassles of data contract inheritance in WCF, a problem called known types. We'll explain the origin of the problem, then show you how to eliminate the problem altogether with the generic resolver.
Juval Lowy