Another behavior that I wrote for my project. The code is simple and there aren’t many things to configure, but it is a good starting point for a nice button popup (many other examples I’ve seen are coded as custom controls; the same can be accomplished using this behavior):

Ever since I wrote Animated Height Behavior, I wanted to create Behavior that will give me nice eye-candy for all my IDataErrorInfo validation needs. You can see the result in the video below, as well as the code of the Behavior. Please note that the image I’m using here is from the Resources (just add…