参考
从Membership 到 .NET4.5 之 ASP.NET Identity
Extending Identity Accounts and Implementing Role-Based Authentication in ASP.NET MVC 5
ASP.NET Identity 2.0: Customizing Users and Roles
Working with Roles in ASP.NET MVC 4+
Working with Roles in ASP.NET Identity for MVC
ASP.NET MVC 5 Identity: Extending and Modifying Roles
On-Premise Application Identity: Windows Authentication in ASP.NET MVC