'EntityStore<TEntity>' is inaccessible due to its protection level - Identity 2.2.1, ASP.NET 4.5

Jan 26, 2016 at 10:29 AM

As an almost beginner in the mysteries of ASP.NET, I am trying to use the Identity system in order to achieve my task. I need a more complex system which would also comprise groups of users so I tried to follow this example:
ASP.NET Identity 2.0: Implementing Group-Based Permissions Management

I encounter a first difficulty yet: my project is a WebForms app, not MVC, I have installed the package Identity 2.2.1 and now I cannot find an implementation of the RoleStore class. When I try to do it myself, just as suggested in the link, I find the following error: 'EntityStore<TEntity>' is inaccessible due to its protection level.

What can I do about it?

Or do you have any other suggestion for implementing a group-based approach according to the Identity system?

Thank you very much!