You should search to see if anyone has done this with the ASP.Net Membership stuff

>Has anyone tackled writing a user administration module in Silverlight 4?
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>Just wondering if there is anything available that makes it less of a PITA than rolling my own from scratch.
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>Need to be able to list, edit, add, and delete users, roles, and users in roles. Need to be able to edit user profiles as well.
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>Seems easy if you are just worried about editing your own user information.
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>All bets are off if you are managing other users.
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>I can do this by going after the aspnet tables directly (or via services), but it's a pain in the a$$. Profiles are a bigger PITA.