Arranging textbox array causing IndexOutOfRangeException at 41

cancelling; trouble found

Arrays are zero based. They start at element 0...
Other than that, your code needs formatting properly

Thanks.

Don't edit your OP and delete the question. Now this thread is all but useless. How is someone else who has the same issue as you supposed to know that this thread could help them now?

I think moderators should have the ability to undo post edits for situations like this. A lot of people do this for some reason that escapes me.