I keep forgetting the keyboard shortcut for this, and can’t remember what the dang thing’s called to search for it. I’m putting it in my blog so I can find it again.

Thanks to David Morton for the nice explanation (http://blog.codinglight.com/2009/03/few-visual-studio-shortcuts.html):

Show Smart Tag - [Shift]+[Alt]+[F10] - What's a smart tag? The smart tag is that little elusive box that gives you options about how to refactor code in certain ways. It's the box that can be opened to add a using statement to the top of your code when you enter a class name that is in a namespace not already in your using statements. I've always found that opening this box can be a little elusive, as I have to hover my mouse over it just right to get the box to expand enough for me to click it. Definitely saves time.