Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive

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I'm trying to access the website on my machine (running XP version 2002 SP3, IIS 5.1, with vs 2008 and I have installed dotnetframework 4.0) but I keep getting the following error:

Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive

Line 33: roleManager
Line 34: compilation debug="true" strict="false" explicit="true" targetFramework="4.0"
Line 35: assemblies
Line 36: add assembly="System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"
assemblies
compilation

I've googled and attempted the various given solutions, i.e. run the command aspnet_regiis.exe -i and changed the version 4.0.30319 on iis manager

Any help would be massive!

Posted 10-Nov-11 1:59am

Member 7909353

Updated 10-Nov-11 19:33pm

v3

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Amol_27101982, India 10-Nov-11 23:59pm

Have you got any solution or not ??

5 solutions

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Syed Salman Raza Zaidi · Answer 1 · 2011-11-10T02:10:00

Solution 2

This code is working fine

HTML

<compilation debug="true" targetframework="4.0"></compilation>

Compare your one with this

Posted 10-Nov-11 2:10am

Syed Salman Raza Zaidi

v2

moneymakermaster · Answer 2 · 2011-11-10T17:38:00

Solution 4

Check the .NET version of Application pool in IIS. If application pool is running on .NET version 2 and the web.Config file specify .Net version 4, you get this error.
Note this may not be the only cause for your error. But check this.

Posted 10-Nov-11 17:38pm

moneymakermaster

#realJSOP · Answer 3 · 2011-11-10T02:09:00

Solution 1

Is .NET framework 4.0 installed on the server?

Did you create an application pool that uses .NET 4.0, and assign that app pool to your application?

BTW, how can you be targeting .Net 4 whith VS2008 when VS2008 doesn't support .Net 4?

Posted 10-Nov-11 2:09am

#realJSOP

Updated 10-Nov-11 2:14am

v2

Amol_27101982, India · Answer 4 · 2011-11-10T02:17:00

Solution 3

To resolve the problem simply go to the ASP.NET Version page in Control Panel to switch the framework to 4.0.

Posted 10-Nov-11 2:17am

Amol_27101982, India

elaiyaraja.r · Answer 5 · 2012-01-21T03:01:00

Solution 5

in menu

Website -> Start Options -> build tab – > Select Target Framework in combo box (.NET FrameWork 4)

By Elaiyaraja.R

Posted 21-Jan-12 3:01am

elaiyaraja.r