The Castle Project (or Castle for short) is an open source application framework for the .Net platform. Castle Project history 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 become disillusioned with Excalibur, he went on to develop and release his own for the .NET platform. Hammett was joined by other developers, after the publishing of a series of articleson The Code Project 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. The castle project still continues to gain acceptance and mind-share