I'm pretty sure you can't install " install plugins/extensions " in the expres editions of VS. Unless, Express SKU is something different ... ?
You're right. I meant to say "can't" there (and apparently it's too late for me to edit that comment now).
The "Express" versions of Visual Studio have been available since 2005. You can install plugins/extensions in the Express SKU, but it's a solid option to get Intellisense and debugging for students, hobbyists, small shops, etc.