Server Error in '/' Application (target framework)

Question

I have a web application developed in Framework 3.5. I changed to newer version of framework 4.0. If I run the same in local host it runs perfectly fine but as soon as I put it up in the web server it gives me the following error

Configuration Error
Description: An error occurred during the processing of a configuration file 
required to service this request.Please review the specific error 
details below and modify your configuration file appropriately.

    Parser Error Message: Unrecognized attribute 'targetFramework'. 
    Note that attribute names are case-sensitive.

Source Error:

<compilation debug="true" targetFramework="4.0">

Kindly help me out. What change I would have to do in the code

Did you checked your `app pool` is running on `Framework 4.0`? — Arun Chandran Chackachattil, Aug 14 '13 at 12:07

score 0 · Answer 1 · answered Aug 14 '13 at 12:04

0

Install .Net Framework 4.0 on IIS Server

answered Aug 14 '13 at 12:04

sangram parmar

8,462
2
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score 0 · Answer 2 · edited May 23 '17 at 10:31

Solution 1:

This typically happens when you have an attribute of targetFramework="4.0" in the web.config but the App Pool is set to run ASP.NET 2.0.

The targetFramework attribute is entirely unrecognized by ASP.NET 2.0

so changing it to 2.0 won't have the desired effect.

Solution 2:

Right click on your website and follow

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

Solution 3:

Still issue persist try this

You can do registering the framework with IIS is what worked for me:

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

Check out this too:

Hope this will solve your issue.

Server Error in '/' Application (target framework)

2 Answers2