I have a website that's using forms authentication and membership. A user must have cookies enabled to use the site. I've been asked to change the code so that the session id is changed as soon as a user logs in. Aparently this will protect against a Session Fixation attack (http://en.wikipedia.org/wiki/Session_fixation). Does anyone know how I can change the session id without losing the whole session ? PHP has a specific method for doing this but I can't find a .NET equivalent.

asp.net security session
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