Till morning website was building with a warning that could not find c:\programfiles\ajaxcontroltoolkit.dll. I had new ajax controltoolkitdll in D:\ which i copied to the c:\programfiles\ajaxcontroltoolkit.dll and hell broke out. I tried googling the solution without any success.
Assembly 'AjaxControlToolkit, Version=4.1.7.1213, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' uses 'System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' which has a higher version than referenced assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'
What are our options ?