Are these alternatives? I'm really confused about this. I am currently using an asp.net Membership provider to secure an application. However, we need to add Facebook's security integration in. We basically have a username/token system that links the guts of the application with the asp.net membership provider system linking them together. The thinking is we would simply link up the facebook username with the existing username/token system.
However, noticed the FormsAuthentication.SetAuthCookie Method mentioned as an alternative in this http://stackoverflow.com/questions/5929396/facebook-authentication-and-asp-net-membership. However, out app will need to support iframes so I don't want the problems one of the posters mentioned about setting cookies from an iFrame.