WS DevCon: Scott Seely: Using inheritance with WS

Scott has shown a design pattern that allows people to use class inheritance with classes that implement web services. I did not grasp all the fine details of the code and unfortunately I can?t find the code examples on Scott?s site. But from what I remember, he?d end up with a base class that would dispatch calls to sub-classes based on the type information found in WSDL. For many sub-classes you would end up with unmanageable switch-case construct. Then again, maybe I just didn?t get it?