ASP.NET 4 running on server with ASP.NET 3.5

Question

Can I compile an ASP.NET 4 application, and run this on a server with ASP.NET 3.5 installed?

Are you asking if 3.5 and 4.0 can run on the same machine, or if 4.0 will run with only 3.5 installed? — ScottE
– ScottE, Commented Nov 16, 2009 at 13:13
I'm asking if I can develop with 4.0, and host it on a machine with only 3.5 installed? — frank
– frank, Commented Nov 16, 2009 at 13:23

mcintyre321 · Accepted Answer · 2009-11-16 13:11:59Z

5

Nope. The .NET 3.5 runtime is the same as the .NET 2.0. The .NET 4.0 runtime is new

answered Nov 16, 2009 at 13:11

mcintyre321

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Comments

mfeingold · Accepted Answer · 2009-11-16 13:35:25Z

0

In VS you can set up any framework version number as the target - including 3.5

answered Nov 16, 2009 at 13:35

mfeingold

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that doesn't mean you can use the language features from .net 4 in .net 3.5 however

That's right, but you can use nice new features of the development environment and still target the old runtime