public ActionResult Register()
{
// Claims-aware "Register" method to display an HTML Form
// Make sure you study the Views/Account/Register.cshtml view code
// It includes new input elements to gather name and claim data
// Define your custom role claims here
// However, in a real-world in-production app, you would likely maintain
// a valid list of custom claims in persistent storage somewhere
var roles = new List<string> { "RoleOne", "RoleTwo", "RoleThree" };
// Define a register form
var form = new RegisterViewModelForm();
form.RoleList = new MultiSelectList(roles);
return View(form);
}