How does the Roles system in asp.net Identity work with Web forms?

I would like to see samples of how the roles system works with Web Forms in the new asp.net Identity system.  All I can find are MVC samples,  absolutely nothing with Web Forms.  I Would like to know, how to set the roles restrictions in folders, and prevent access to specific pages?  Does it work the way it has always worked,  you set folder permissions in the webcconfig in each directory?

I Appreciate the help,