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[jmcilhinney]

1- Exit For prevents removing dublicated itemes in ListView1

There are no duplicate items in this case, as stated in post #5.

2- When modifying a collection inside loop, it must be reversed loop

That's only so that the indexes of the items you are yet to visit are not affected but because the fact that there are no duplicate items means that you can, and SHOULD, break out of the loop as soon as you find a match, it doesn't matter about changing indexes because we're not going to visit any more items anyway.