C# Trivia Test Format

I've got some good questions for the trivia test, though I am still looking for more. Anything that you've found surprising while writing in C# would be fair game.

Rather than doing this in series of posts, I'm thinking of doing it in one big post (or perhaps four smaller posts), so that it's more compact. What do you think? 1 post? 2 posts? red post? blue post? Do them all at once, or spread them out?