I was writing up some posts on how ValidationRules work, and of course, I ended up confusing myself, because data binding can get confusing once you start throwing in IValueConverters, ValidationRules, target objects, source objects…yikes.
So I decided to sketch out a simple diagram for my own benefit. And after 15 minutes, I realized it wasn’t so simple:

Click the image for a larger version
Hope it helps make WPF binding less confusing… —DKT