This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
I too am not 100% sure what you are asking, but I suspect it can be answered by the classes Ulf mentions above. And in that case, this is not an advanced question, so I'll move this topic to a more appropriate form.