404.2 Error after installing .net 4.0

Question

I have a project which I have upgraded to .Net 4.0, but when I try to access it, I retrieve the following error:

HTTP Error 404.2 - Not Found
The page you reques         


        

Answer 1

I had this same issue. Strangely, for me it would run in integrated mode but not in classic mode for .NET 4. After enabling the .NET 4 extensions via the Isapi and Cgi restrictions section in IIS 7, it then began working in both modes. The Isapi and Cgi restrictions section is located at the server level node in IIS manager. This option should not be confused with the Isapi Filters section at the site level.

Answer 2

In IIS, enable .NET 4.

Here is image:

Answer 3

I take it you're running on IIS6 right now..

Open the IIS manager, and go to the Web Service Extensions area.. You'll be able to enable .NET 4 in there.. All new extensions are disabled by default :)

If you're running on IIS7, .NET might not have registered in IIS.. Then open up an admin command prompt and navigate to the .NET 4 framework folder (C:\Windows\Microsoft.NET\Framework\v4.{version}). If you're on a 64 bit machine go to the Framework64 folder instead of the Framework folder. Then run aspnet_regiis -i in there