When you have a class in UnisciTE, you have hilight it, F1 it will open the browser on Unity script, that is cool, what about Visual Studio Express? Can we do that?
I assume that you have tried already... so you know the answer ;-)
Anyway. The community wiki does have an awesome article about using Visual Studio with Unity. It is not the most up-to-date wiki page, but who can keep up with rapid development :-p
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