Simple code implementation of some architectural patterns

I was wondering if anyone knew of any simple code implementations of the following architectural patterns (in Java or C#):

* Blackboard (passive & active)
* 开发者_Python百科Presentation Abstraction Control (PAC)
* MVC

Thanks in advance

The following link will provide a java implementation of the Presentation Abstraction Control pattern:

http://www.vico.org/pages/PatronsDisseny/Pattern%20Presentation%20Abstra/

Following is an article on the MVC pattern:

http://www.c-sharpcorner.com/UploadFile/rmcochran/MVC_intro12122005162329PM/MVC_intro.aspx

Martin Fowler has some reasonable simple examples along with explanatory text for MVC patterns in the links on this page: http://martinfowler.com/eaaDev/ModelViewPresenter.html

There are a multitude of examples in various languages just waiting for you at wikipedia...