Finding Roles MVC 4 Simple Membership

Finding Roles MVC 4 Simple Membership

My Action
[Authorize(Roles = "Admin")]
public ActionResult Index()
{
using (var ctx = new _dbContext())
{
return View(ctx.UserProfiles.OrderBy(x => x.UserId).ToList());
}
}
I want to display roles with UserId and UserName how can i do that??