Unrecognized attribute 'targetFramework'.

Question

I'm trying to up load my site and I'm getting this error message:

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

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

The site works fine on my local PC but won't open when I loaded it to my host and tried to view it online.

Answer 1

In IIS

Click on Application Pools

Right Click on DefaultAppPool --->> Set Application Pool Default....--->>Change .Net Version to V 4.0.

Answer 2

I was facing the same issue while publishing my 1'st web services. I resolved it by simply doing this:

1. Open IIS

2. Click on Application Pools

3. Right Click on DefaultAppPool => Set Application Pool Default => Change .Net Version to V 4.0. (You can also change .Net Framework Version of your application specifically)

Hope, it'll work.

Answer 3

Follow these two steps:

Register the .net framework version version 4.0 (if it is not registered)

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

2. In the app pool change the .net framework to v4.0

Answer 4

Open Project -> press Shift + F4 (Open properties page) -> Chose Build -> in Target Framework chose .NET Framework 4 -> OK

Answer 5

What I did: I did change the value of Application Pool to DefaultAppPool from a previous value. You do this in the Advanced Settings (Website --> Manage Website --> Advanced Setting>.

Answer 6

I had the same issue and I found this nice poweshell script to update all of your app pools at the same time: https://gallery.technet.microsoft.com/scriptcenter/How-to-set-the-IIS-9c295a20

Make sure to set you $IISAppPoolDotNetVersion = "v4.0" variable at the top.