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patterns & practices Application Architecture Guide 2.0

Welcome to the patterns & practices Application Architecture Guide 2.0 project site! This guide provides design-level guidance for the architecture and design of applications built on the .NET Framework. It focuses on the most common types of applications, partitioning application functionality into layers, components, and services, and walks through their key design characteristics. This guide is a collaborative effort between patterns & practices, product teams, and industry experts.

Now Available on MSDN!

October 2009 - The completed Application Architecture Guide 2nd Edition is now available on MSDN here. The printed version will be available from your favorite bookstore in a month or so. Since the final draft of guide was published on this site early this year, we’ve been busy driving the guide through a final set of reviews and polishing the content. We’ve restructured the guide to make it easier to read and understand, and made it easier to find your way around so you can more easily find the guidance that’s relevant to you. We’ve also incorporated a lot of the feedback that we’ve received from the community.


- J.D. Meier, Alex Homer, David Hill, Jason Taylor, Prashant Bansode, Lonnie Wall, Rob Boucher Jr, Akshay Bogawat

Knowledge Base

The guide was developed in conjunction with our Application Architecture Guide v2.0 Knowledge Base Project. The knowledge base project was used to inform and steer the guide during its development. The App Arch Knowledge Base includes a large amount of material that elborates on specific topics in the main guide. It also includes draft material from the main guide that is targeted and packaged for more specifc audiences, such as the Pocket Guide series.


Please post comments on the Discussions page.
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The Team

  • Core Dev Team: J.D. Meier, Alex Homer, David Hill, Jason Taylor, Prashant Bansode, Lonnie Wall, Rob Boucher Jr, Akshay Bogawat
  • Test Team - Rohit Sharma, Praveen Rangarajan, Kashinath TR, Vijaya Jankiraman
  • Edit Team - Dennis Rea
  • External Contributors/Reviewers - Adwait Ullal; Andy Eunson; Brian Sletten; Christian Weyer; David Guimbellot; David Ing; David Weller; Derek Greer; Eduardo Jezierski; Evan Hoff; Gajapathi Kannan; Jeremy D. Miller; John Kordyback; Keith Pleas; Kent Corley; Mark Baker; Paul Ballard; Peter Oehlert; Norman Headlam; Ryan Plant; Sam Gentile; Sidney G Pinney; Ted Neward; Udi Dahan
  • Microsoft Contributors / Reviewers - Ade Miller; Amit Chopra; Anna Liu; Anoop Gupta; Bob Brumfield; Brad Abrams; Brian Cawelti; Bhushan Nene; Burley Kawasaki; Carl Perry; Chris Keyser; Chris Tavares; Clint Edmonson; Dan Reagan; David Hill; Denny Dayton; Diego Dagum; Dmitri Martynov; Dmitri Ossipov; Don Smith; Dragos Manolescu; Elisa Flasko; Eric Fleck; Erwin van der Valk; Faisal Mohamood; Francis Cheung; Gary Lewis; Glenn Block; Gregory Leake; Ian Ellison-Taylor; Ilia Fortunov; J.R. Arredondo; John deVadoss; Joseph Hofstader; Koby Avital; Loke Uei Tan; Luke Nyswonger; Manish Prabhu; Meghan Perez; Mehran Nikoo; Michael Puleio; Mike Francis; Mike Walker; Mubarak Elamin; Nick Malik; Nobuyuki Akama; Ofer Ashkenazi; Pablo Castro; Pat Helland; Phil Haack; Rabi Satter; Reed Robison; Rob Tiffany; Ryno Rijnsburger; Scott Hanselman; Seema Ramchandani; Serena Yeoh; Simon Calvert; Srinath Vasireddy; Tom Hollander; Wojtek Kozaczynski


'Content Complete' Draft

January 2009 - The latest "content complete" release is available! We are still looking for feedback and we would try and incorporate them down the line. So please rate the release and use Discussions tab above to provide feedback. Any issues should be reported on the Issues Tracker tab above.


Part I, Fundamentals
Part II, Design
Part III, Layers
Part IV, Archetypes



Part I, Fundamentals

Part II, Design

Part III, Layers

Part IV, Archetypes


Errata Page


Last edited Nov 23, 2009 at 9:26 PM by jmeier, version 3


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