Differentiating Between Visual Studio Versions

Question

I need to figure out which version of Visual Studio 2008 is installed on particular computers.

Is there a way I can differentiate between Visual Studio Team System 2008 vs Visual Studio 2008 Development Edition?

Are there particular files installed for one that are not installed for the other?

To Clarify my question, I would like to differentiate between:

Where is your code running? as a VS Package, Addin, or just an external program? — Simon Mourier
I'm confused, what code are you talking about? I personally have the Visual Studio Team System 2008 Team Suite installed on my machine, and any code I write, I can debug, add to source control and release if necessary. — acidRain
Because if the code is ran from inside Visual Studio itself as an extension, there are some ways. From your answer, I suppose it's compiled as an external app (an .exe) for example. — Simon Mourier

ChrisF ChrisF · Accepted Answer · 2010-12-08T16:35:08

I think the registry would be your best bet. I've found the following key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\9.0\InstalledProducts

Under this there's a key for each product installed:

I don't know whether there's enough there to go on to uniquely identify each version, but it might get you most of the way there.