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We have a server which has .net framework 3.5 applications (asp.net & .net) running on it . And currently we are developing an application in .net framework 4.0 and we have to deploy this to the server.
Can we install .net framework 4.0 and 3.5 on the same system . And without recompiling or upgrading the existing applications. Please advise
You can definitely install .NET 4 on the same machine. It shouldn’t be a problem at all. Try it on a test server first in case you’re doing anything unusual 🙂
(In particular, I don’t know whether IIS application pools are automatically upgraded to .NET 4, or how that would affect your .NET 3.5 apps.)