A PONG clone created in C# using GDI+. Download here
I finally got around to posting this ... it's been done for a couple of months. I'm quite proud of how far I've come with this. Even though it's not perfect.
The AI is predictable.
There's a collision bug with the paddle and the ball (it doesn't usually pop up though).
No Sound.
Aside from that .. I think the code is well structured and uses OOP methods appropriately. Source code is included in the zip file so you're free to check it out.
Next on my list is to learn Open GL