Castle Project

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Castle Project
Stable release 3.3.3 / Nov 6th, 2014
Operating system Cross-platform
Type Application framework
License Apache 2.0

The Castle Project (or Castle for short) is an open source application framework for the .NET platform.


The project was founded by Hamilton Verissimo de Oliveira (Hammett), who was a member of the Apache Avalon and the Apache Excalibur projects. Keenly interested in the development of an inversion of control container, after he resigned from Avalon and became disillusioned with Excalibur, he went on to develop and release his own for the .NET platform.

Hammett was joined by other developers after publishing a series of articles on Code Project,[1][2] and the Castle Project eventually expanded its mission "to provide a simple set of tools to speed up the development of common enterprise and web applications while promoting good architecture".[3]

The Castle Project continues to gain acceptance and mind-share from the .NET community, including recognition from Microsoft thought leaders as a framework to assist with building "robust, extensible, working software".[4]

In 2006 Hammett started his own company to offer commercial support for the Castle Project and for the applications developed using the framework. In August 2008 he joined Microsoft as a Program Manager on the MEF team.[5]

On October 31, 2008 Hamilton announced on his blog[6] that the Castle Project had been split, and subsequently all subprojects would be maintained and released independently.

The first project to be released after the split was DynamicProxy on May 4, 2009.[7]



  1. ^ "Introducing Castle - Part I". Retrieved 2004-12-27. 
  2. ^ "Introducing Castle - Part II". Retrieved 2005-01-26. 
  3. ^ Krill, Paul (2006-11-21). "Castle built for .NET". 
  4. ^ Eini, Oren (2006-11-10). "Inversion of Control and Dependency Injection: Working with Windsor Container". 
  5. ^ "Joining Microsoft". Retrieved 2015-10-14. 
  6. ^ "Changes to Castle Project". Retrieved 2015-10-14. 
  7. ^ "Castle DynamicProxy 2.1 RTM is now available". Retrieved 2015-10-14. 

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