Friday, June 11, 2010

Encounter 'ASP.NET Ajax client-side framework failed to load' error

Sometimes you may encounter 'ASP.NET Ajax client-side framework failed to load' error when AJAX is used in your ASP.NET web application.

If you are running ASP.NET AJAX under Internet Information Services 7.0, the below has to be included in your web.config file.



  
  
    
    
  
  
    
    
    
    
    
    
    
  

If you are running Windows 7 or 2008 Server and you have IIS installed, then it is very likely the version is of 7.0.

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