.Net 3.5 Dll in .Net 4.0 application any problems

We plan to move an obsolete application that uses the enterprise library 4.1, which uses .Net 3.5 in the .NET 4.0 web application.

We are wondering if this will cause any performance problems? Will .net 3.5 code work in another application pool?

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I finally found the answer to this question. The performance issue that I mentioned earlier was discovered by my team due to something else. Do not load .NET 3.5 in the .NET 4.0 application domain.

: http://msdn.microsoft.com/en-us/magazine/ee819091.aspx

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