Here's my go at WPF. I didn't have anything practical to make, so I just made a quick demo of a POS application. I've never actually used a POS application before, so the general design probably isn't ideal. Looking back, I'd probably do it a lot differently, but I'm fairly satisfied with this.

In this demo, I actually didn't even use VS that much. Most of this was just done in Expression Blend. When I have an actual practical application to develop in WPF, I'll of course use VS a lot more.