ASP .NET Custom RoleProvider not respecting cacheRolesInCookie="true"

Question

I've implemented a custom role provider, and configured it in my web.config file like this:

<roleManager enabled="true" defaultProvider="TDRoleProvider" cacheRolesInCookie="true">
  <providers>
    <clear/>
    <add name="TDRoleProvider" type="TDRoleProvider"/>
  </providers>
</roleManager>

I've overridden the GetRolesForUser function in my custom role provider, and I've stepped into it, and it works just fine - loads up 60 roles for the user I'm testing with. However, I've noticed that the GetRolesForUser gets called on every request that calls User.IsInRole. In other apps I've written, it only calls it once, then caches the result in the cookie. For some reason, the caching is not working for this app. Any ideas as to why?

Answer 1

https://web.archive.org/web/20101123220352/http://connect.microsoft.com/VisualStudio/feedback/details/104688/rolemanager-cacherolesincookie-option-does-not-work

"The issue of when to cache (or not cache) in RolePrincipal went through a number of design iterations, and we finally settled on only caching for the method exposed by the IPrincipal interface (i.e. IsInRole). "