I havn't been here long but I have noticed a lack of that in kata instructions. While it occurs to me that one should check for invalid input, I've been deciding not to do it because I just want to get to the next problem. Bad attitude, I'm sure.

I was coming to say the same thing. My solution wasn't very elegant, but it popped into my brain immediately.

I've come to see how important Linq is but it's so confusing to look at I've been procrastinating instead of learning it...