.NET: Why is TryParseExact failing on Hmm and Hmmss?

Question

I\'m trying out the DateTime.TryParseExact method, and I have come over a case that I just don\'t get. I have some formats and some subjects to parse that each

Answer 1

0123 012345

I'm guessing it looks for a length of 2/4/6 when it finds a string of numbers like that. Is 123 supposed to be AM or PM? 0123 isn't ambiguous like that.