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How do I properly upgrade to .Net 4.0 from 2.x

Posted on 2010-09-24
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Last Modified: 2013-11-07
Experts,
  My goal is to get AJAX into Sharepoint and found the the .NET Framework is at 2. So I thought it necessary to update to .NET 4.0.  I did a windows update/install and it installed the 4.0. However when I switch(using IIS Manager) from one of the Sharepoint sites from 2 to 4 Sharepoint gives the HTTP Error 404. So I have to switch it back to 2 in order for the site to remain up.  What have I done incorrectly?

While I don't think this has anything to do with it...its worth mentioning.
I added AJAX dll to Sharepoints BIN directory.

Added the following to the web.config.
<assemblies>
    ...
    <add assembly="AjaxControlToolkit, Version=4.0.0.0, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e"/>
    ....
</assemblies>
<controls>
    ...
    <add namespace="AjaxControlToolkit" assembly="AjaxControlToolkit" tagPrefix="ajaxToolkit"/>
    ....
</controls>


Please give detailed instructions.
Thanks.
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Question by:LIFEEXPERT
2 Comments
 
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Accepted Solution

by:
JimmyITCS earned 500 total points
ID: 33758415
LIFEEXPERT,
Take a look here, I think this is what you are looking for, it is fairly detailed as well.

http://msdn.microsoft.com/en-us/library/dd483478.aspx

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Author Closing Comment

by:LIFEEXPERT
ID: 34002513
Project was canceled... and did investigate further
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