Question

I am aware of implementations like dynamic menu creation based on roles or pages inheriting from different base pages. Web.config for different site sections.

I do not want to use the default asp.net membership table structure in the database. I want to use something less complex.

I am looking at a possibility that roles can come and go anytime without affecting pages too much. I am also looking for performance.

Answer 1

You could create a custom RoleProvider, here is an article about it:
http://davidhayden.com/blog/dave/archive/2007/10/17/CreateCustomRoleProviderASPNETRolePermissionsSecurity.aspx

Have it reference a many-to-many table that stores the role and user id relationships.