IIS cant create a .net 3.5 app pool

I'm trying to host a .net 3.5 website on my server.

I installed t开发者_高级运维he 3.5 role and restarted the server and restarted.

I still can't create an app pool with .net 3.5.

It's IIS7 server 2008.

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You can't select 3.5 as a version in IIS. Only 2.0 and 4.0. Not sure if 1.1 will work in IIS 7. If you want to publish a 3.5 site, select 2.0 as the app pool .net runtime.

3.5 lies on top of 2.0.

Update If you would like to install the .NET 4 runtime in IIS. First just install the runtime and after that run the following command:

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -i

This will register the v4 runtime in IIS.

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.NET 3.5 still runs on the 2.0 CLR. The framework versions 3.0 and 3.5 only added to the Base Class Library and added additional frameworks. 3.0 added WCF, WPF, and Workflow. It also contained a lot of the base framework additions for Linq which was added in 3.5. These still run on the 2.0 CLR. Framework version 4.0 also came with an upgrade to the CLR.