I've just convert my project from .net 3.5 and .net 4.0 And my scriptManager isn't working anymore. It's giving me this error : Could not load ScriptManger because it dosen't exists In System.Web.Ui.
I've also have a problem using Lambda expression in my project, .net 4 don't seems to work well with system.Linq
Thank you very much for your answer, i'm loosing hair right now :)
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