Determining Dot Net Requirement(s)...

[!NoItAll]

I distribute my application with several DLLs. Some I created - some are third party DLLs I have purchased (with distribution rights of course). I would like to definitively determine what version of .NET (3.0, 3.5, 4.0...) each and every DLL requires.
Does anyone know of a program that I can run to determine what Dot Net version an assembly requires to operate?
This would seem to be a great analytical tool to make sure your installations/distributions are sound.

Des

[!NoItAll]

I found something that works - for the most part. It's called dotnet reflector and is available for free at:

http://www.red-gate.com/products/reflector/index.htm

It's a bit quirky - reports .net 3.5 as .net 2.0, but you can dig a bit and find out what you need to know.
Should be simpler - but c'est la vie...