I upgraded my OS recently to Vista and today I had to work on the Ajax controls. Since, my VS 2005 is reinstalled, I tried to add the Ajax control toolkit to the Toolbox, but couldn’t succeed and got this error
Could not load file or assembly ‘System.Web.Extensions’.
The reason I couldn’t add it is because of the User Account Control. I needed to start Visual Studio as an Administrator and was able to add the toolkit. Just a quick tip 😉
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