public static ApplicationRoleManager Create(
        IdentityFactoryOptions<ApplicationRoleManager> options,
        IOwinContext context)
    {
        var manager = new ApplicationRoleManager(
            new RoleStore<IdentityRole>(context.Get<ApplicationDbContext>()));
        return manager;
    }
}

    public ApplicationRoleManager(IRoleStore<IdentityRole, string> roleStore)
        : base(roleStore)
    {
    }

    public static ApplicationRoleManager Create(IdentityFactoryOptions<ApplicationRoleManager> options, IOwinContext context)
    {
        //var manager = new ApplicationRoleManager(new RoleStore<IdentityRole>(context.Get<ApplicationDbContext>()));
        //var manager = new ApplicationRoleManager(new RoleStore(new DbContext()) { DisposeContext = true });
        var manager = DependencyResolver.Current.GetService<ApplicationRoleManager>();
        return manager;
    }
}