[dkersten]

Sure. Though if we're talking about efficiency, I would imagine that counting backwards would be slightly faster than getting the current count each time. Though in reality this depends on way too many factors - I imagine TabPages would be stored in cache and getting the count is just as fast as counting backwards. Micro-optimization and all that.

Regarding for vs while, I find the choice is important only in the intent they emphasize: while puts emphasis on the condition, whereas for puts the emphasis on the iteration. I think in this case the condition (that the list is not empty) is deserves more emphasis than the iteration through the elements of said list - hence why I find the while version to be more readable. YMMV and all that :)