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.
The same way you would access it anywhere else. But if the List is a private member of another class, and it doesn’t have public getList() or addToList(...) methods, etc., then maybe you ought not to try.