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Could not load file or assembly 'System.Web.Extensions, Version=2.0.0.0, Culture=neutral, PublicKey

Posted By:      Posted Date: October 11, 2010    Points: 0   Category :ASP.Net		 

 I created a website with AJAX using VS2005, installed the framework in the production server and the website is working fine.

 then I installed VS2008 + Service pack in my computer without uninstalling VS2005, then converted my project to VS2008, with no issues.

then I installed Framework3.5 in the production server without uninstalling Framework2.0. Tested the website and it's good except when I try to run a Crystal report it gave me this error :

 

 Error

 

Could not load file or assembly 'System.Web.Extensions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

 

 

[web.config]

 

<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
    <configSections>
        <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtension


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dear my firends,

i convert website to the vs 2010  but with the same target Framework 2.0.

i have the (System.Web.Extensions, Version=1.0.61025.0) in my BIN folder.

when i build the website using vs 2010 and publish it to the production server which running only framework 2.

i get these error

"Could not load file or assembly 'System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)".

 

when i back to vs2008 and build it again and publish to the production server it is working great.

the question is .

Why vs2010 try to refrence System.Web.Extensions, Version=4.0.0.0 when compile where is the dll in the BIN folder is "System.Web.Extensions, Version=1.0.61025.0"

Thanks

 


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thanks in advance for every answer Smile

 

hello from switzerland !

 

steve


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