DbContextSeed.cs

protected override void Seed(AppDbContext context) {
    // define roles
    var role = new Role("SimpleUser");
    var roleAdvanced = new Role("AdvancedUser");

    // define activities
    var readActivity = new Activity("Read");
    var updateActivity = new Activity("Update");
    var deleteActivity = new Activity("Delete");
    var manageActivity = new Activity("Manage");

    // define resources
    var blogsResource = new Resource("Blogs");
    var talksResource = new Resource("Talks");
    var eventsResource = new Resource("Events");

    // allow simple user to read blogs
    var blogsReadActivity = new RoleResourceActivity { Role = role, Resource = blogsResource, Activity = readActivity };            
    context.RoleResourceActivities.Add(blogsReadActivity);

    // allow advanced user to update blogs
    var blogsUpdateActivity = new RoleResourceActivity { Role = roleAdvanced, Resource = blogsResource, Activity = updateActivity };
    context.RoleResourceActivities.Add(blogsUpdateActivity);

    var blogsDeleteActivity = new RoleResourceActivity { Role = roleAdvanced, Resource = blogsResource, Activity = deleteActivity };
    context.RoleResourceActivities.Add(blogsDeleteActivity);

    // allow simple user to read talks
    var talksReadActivity = new RoleResourceActivity { Role = role, Resource = talksResource, Activity = readActivity };
    context.RoleResourceActivities.Add(talksReadActivity);

    // allow advanced user to update talks
    var talksUpdateActivity = new RoleResourceActivity { Role = roleAdvanced, Resource = talksResource, Activity = updateActivity };
    context.RoleResourceActivities.Add(talksUpdateActivity);

    var talksDeleteActivity = new RoleResourceActivity { Role = roleAdvanced, Resource = talksResource, Activity = deleteActivity };
    context.RoleResourceActivities.Add(talksDeleteActivity);

    // create one user
    var user = new User("User", PasswordHash.CreateHash("User"));
    var user2 = new User("User2", PasswordHash.CreateHash("User2"));

    // add both "SimpleUser", "AdvancedUser" roles
    user.Roles.Add(role);
    user.Roles.Add(roleAdvanced);

    user2.Roles.Add(role);

    // commit changes
    context.Users.Add(user);
    context.Users.Add(user2);
    context.SaveChanges();
}