I have a problem with using gridview, scriptmanager and other controls. My visual studio 2010 says: "Element 'scriptmanager' is not a known element. This can occurif there is a compilation error in the website, or the web.config file is missing."
Visual studio is complaining on updatepanel, gridview, scriptmanager and some others. I've searched the net for this, and some people say this can happen if you use masterpages, others say that there could be some missing lines in the web.config file. I can't really find a example on how the web.config should look like, neether can I find how to solve the issues with masterpages.
Does anyone out there know of a good and informative article that i can read, or maybe try to explain what i can do and what the issue may be?
here's my web.config content:
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<sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=184.108.40.206, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
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