pbeckingham,
Try to remember that I am not trying to develop a generic utility that can diff any two CSV files. I am developing a solution to replace an existing product that is going away. The developers can work off that assumption because that is how it currently works.

You did give me food for thought. Since it is unlikely that my solution will be used, I should come up with some that could easily be converted to be generic as so far, no one has mentioned an existing product.