Hi
I get the one project.I newly open that project.But while i run that project the below error occured in web.config.I cant get the correct solution.Can anyone solve my problem?

could not load file or assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

Thanks

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