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I have a solution that contains dlls from janus that ate compatible with .net 4.

After I installed visual studio 2012 - the application throws an exception : "the member is not supported in a dynamic assembly" although I open it with visual studio 2010.

I could uninstall .net 4.5 and then reinstalling .net 4 but then visual studio 2012 wont work.

Anyone knows a way I can keep vs2012 and .net 4's dlls?

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Did you upgrade your project to 2012? Also, what libraries specifically are giving you errors> – AthomSfere Jul 7 '13 at 14:56
    
No, I opened an 2010 solution in vs 2010. And every janus dll is giving me the error (timeline, gridex, etc...) – user779444 Jul 7 '13 at 15:18
    
I'd say it's the Janus controls that are the problem. You may need a newer version. Reference: devexpress.com/Support/Center/Question/Details/Q435047, related: bloggingabout.net/blogs/vagif/archive/2010/07/02/… – Ƭᴇcʜιᴇ007 Jul 9 '13 at 0:52

You can't have them both, .Net 4.5 is an in-place upgrade to 4.0.

References:

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Although, this breaking VS 2010 is hit or miss. I have had no problems with VS 2010 since installing 4.5 and VS 2012. – AthomSfere Jul 7 '13 at 16:56

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