Can a .Net 4.0 assembly be used in a .Net 3.5 application?

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How to reference .NET 4.0 assembly within .NET 3.5 projects

Is there any way to ineteroperate a 4.0 assembly (a WPF interface) within a 3.5 application (an MFC Application). This application is giving us no end of trouble attempting to migrate it to 4.0.

score 0 · Accepted Answer · answered Oct 08 '10 at 19:45

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They are running on different .NET runtimes and CLRs, so unfortunately no, this is not possible.

answered Oct 08 '10 at 19:45

Oded

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But the opposite can be accomplished, no? – Jordan Oct 11 '10 at 12:47
@Jordan - I am not sure, though what I have read suggests that it is possible. – Oded Oct 11 '10 at 12:48

Can a .Net 4.0 assembly be used in a .Net 3.5 application?

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