Authentication and authorization in asp.net

When we using asp.net membership provider we can easily restrict pages from anonymous user by adding in web.config file:

<?xml version="1.0"?>
    <configuration>
       <system.web>
         <authorization>
          <allow roles="Manager,Admin" />
          <deny users="*"/>
        </authorization>
      </syste开发者_高级运维m.web>
    </configuration>

in my application i don't use asp.net membership authentication and i have my own tables with custom structure. also i have my User, Roles and UserInRoles Tables. i want to enable this mechanism in my application

any ideas?

Refer to the following:

Implementing a Membership Provider

Implementing a Role Provider

Implementing a Profile Provider

[How Do I:] Create a Custom Membership Provider? (Video)

[How Do I:] Create a Custom Profile Provider? (Video)