accessing listbox in user control from aspx page

From my aspx page, I need to access the items in a listbox that is in a user control.  I know I can do something similar to ListBox lstbox = (ListBox) usercontrol1.findcontrol("listboxProduct").  But if I have 6 user controls then I would have to repeat that logic 6 times.  Is there a more dynamic way to do this?

Thanks.
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