Moving from XNA to Unity, any tutorials?

Hello,

I’ve been using XNA for quite a while now and decided to pick up Unity. I was wondering if anyone knew of any 2D game tutorials for Unity that focus on teaching how to use Unity from a programming point of view. I had a look at a few tutorials so far but none of them met my requirements; I’m looking for something which shows you how to get started doing everything in code, like creating my own classes for everything.

Regards,
Joseph

GameToGameDeveloper and TornadoTwins