EBook - Patterns & Practices Application Architecture Guide 2.0

The Application Architecture Guide 2.0 provides design-level guidance for the architecture and design of applications built on the .NET Framework.

The guide talks about the Fundamentals of Application Architecture and proposes Design Guidelines. It also discusses design and deployment patterns along with some cool guidelines while designing a layered approach. 

Also check out the common type of architecture types(Web, Windows, Mobile) and their key design characteristics. There are also some cheat sheets at the end.

Overall, a 'must-read' guide if you plan to architect solutions around .NET

Download the Application Architecture Guide 2.0