In previous post, I showed you how to add property to Identity user. Another common requirement when using ASP.NET Identity is adding new property to IdentityRole. In this post I’ll share a step by step guide which is inspired by my answer to this question question in stackoverflow about adding new property to Identity role.

To add a new property to IdentityRole, you can follow the following steps:

1. Create an ASP.NET Web Application
2. Make sure you select MVC and the Authentication is Individual User Accounts
3. Go to Models folder → Open IdentityModels.cs and Create ApplicationRole class containing the custom property that you want to add:

   public class ApplicationRole : IdentityRole   
   {
       public string Description { get; set; } 
   }
   

4. Change GenerateUserIdentityAsync method of ApplicationUser to accept parameter of type of UserManager<ApplicationUser, string>:

   public class ApplicationUser : IdentityUser
   {
       public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser, string> manager)
       {
   

5. Change ApplicationDbContext base class and introduce all the generic parameters:

   public class ApplicationDbContext : IdentityDbContext<ApplicationUser, ApplicationRole, string, IdentityUserLogin, IdentityUserRole, IdentityUserClaim>
   {
       public ApplicationDbContext()
           : base("DefaultConnection")
       {
   

6. Build the project.

7. Go to TOOLS menu → Nuget Package Manager → click Package Manager Console

8. Type Enable-Migrations and press Enter and wait until the task get completed.

9. Type Add-Migration "ApplicationRole" and press Enter and wait until the task get completed.
10. Type Update-Database and press Enter and wait until the task get completed.

11. Go to App_Start folder → Open IdentityConfig.cs and Change the ApplicationUserManager class to derive from UserManager<ApplicationUser, string> and also change its Create method to return a UserManage aware of ApplicationRole:

    public class ApplicationUserManager : UserManager<ApplicationUser, string>
    {
        public ApplicationUserManager(IUserStore<ApplicationUser, string> store)
            : base(store)
        {
        }
    
        public static ApplicationUserManager Create(IdentityFactoryOptions<ApplicationUserManager> options, IOwinContext context)
        {
            var manager = new ApplicationUserManager(new UserStore<ApplicationUser, ApplicationRole, string, IdentityUserLogin, IdentityUserRole, IdentityUserClaim>(context.Get<ApplicationDbContext>()));
    

12. To manage roles, create ApplicationRoleManager class in the same file:

    public class ApplicationRoleManager : RoleManager<ApplicationRole>
    {
        public ApplicationRoleManager(IRoleStore<ApplicationRole, string> store) : base(store) { }
    
        public static ApplicationRoleManager Create(
            IdentityFactoryOptions<ApplicationRoleManager> options,
            IOwinContext context)
        {
            return new ApplicationRoleManager(new RoleStore<ApplicationRole>(context.Get<ApplicationDbContext>()));
        }
    }
    

13. Go to App_Start folder → Open Startup.Auth.cs and add the following code to the ConfigureAuth method:

    ConfigureAuthapp.CreatePerOwinContext<ApplicationRoleManager>(ApplicationRoleManager.Create);
    

Now the project is ready to take advantage of the new ApplicationRole.