When I though ihad all the Visual Studio plugins that I need, I came across Smart Paster. This little gem lets you past your clipboard content as a quoted String, StringBuilder, region or comment. I used it 20 minutes after installing to quickly generate a static header of I file I'm generating as a StringBuilder.
Be sure to click Configure... and tweak the behaviour to your preference!
(Found via Ten Essential Tools - Visual Studio Add-Ins Every Developer Should Download Now)