When Visual Studio 2012 was released, it supported a new way of building apps – Windows Store apps using the Windows Runtime. These apps could be built in XAML, of course. But, unlike previous Microsoft developer tooling, Expression Blend was not shipped separately; it was moved out of the Expression Suite (which was discontinued), and bundled as part of Visual Studio – forevermore.
This meant all developers completing developer tasks could use Visual Studio with comprehensive coding features. Moreover, all developers completing design tasks could use Blend for Visual Studio with comprehensive animation and styling features. It was a brilliant union. Today, still, a Visual Studio installation includes Blend by default. Developers have the best of both worlds.
Aside: this article does not talk about custom behaviors. It’s not that custom behaviors are too complex, it’s that there’s too much to say about the built-in behaviors first. I’ll try to follow-up with a custom behaviors article. In the meantime, enjoy.