Have you ever noticed your IIS 6.0 site is running the wrong version of .net?

This post explains how to change the asp.net version of a specific iis 6.0 website to asp.net 4.0

First find your website using

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -lk

I have limited the output for simplicity below (a you can see the site is using .net 2.0 currently):

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -lk | find "W3SVC/1975602314/root/"
W3SVC/1975602314/root/  2.0.50727.3053

Run this command to change the site to the .net 4.0 framework:

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -s W3SVC/1975602314/root/ -norestart
Start registering ASP.NET (4.0.30319) recursively at W3SVC/1975602314/root/.
Finished registering ASP.NET (4.0.30319) recursively at W3SVC/1975602314/root/.

Determine the site’s application pool:

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>C:\Inetpub\AdminScripts\adsutil.vbs  get w3svc/1975602314/root/apppoolid
apppoolid                       : (STRING) "some_app_pool_name"

Restart the site’s application pool:

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>cscript %SystemRoot%\System32\IIsApp.vbs /a some_app_pool_name /r
Microsoft (R) Windows Script Host Version 5.6
Copyright (C) Microsoft Corporation 1996-2001. All rights reserved.

Connecting to server ...Done.
Application pool 'some_app_pool_name' recycled successfully.

Verify changes:

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -lk | find "W3SVC/1975602314/root/"
W3SVC/1975602314/root/  4.0.30319.0

Reference: ASP.NET IIS Registration Tool (Aspnet_regiis.exe)

ASP.NET IIS Registration Tool (Aspnet_regiis.exe)

Last modified: April 18, 2012



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