asp.net - Why would User.IsInRole return true, but AuthorizeAttribute not? -

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i'm securing asp.net mvc 2 application, , have user in role "foo".

this true:

user.isinrole("foo")

but yet, when attempt lock down controller action following, user denied:

[authorize(roles = "foo")] public actionresult privatepage() {     return view(); }

if isinrole reports true, why authorize attribute not allow user in?

it caused if storing persistent cookies forms authentication cookie. in scenario isinrole may check against cookie without verifying date login.


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