public ActionResult Create(RegisterModel register, string[] roles=null)
 {
     if(ModelState.IsValid)
     {
         WebSecurity.CreateUserAndAccount(register.UserName, register.Password);
         roleProvider.AddUsersToRoles(new[]{register.UserName},roles );
         return RedirectToAction("Index");
     }
     return View(register);
 }
        public ActionResult Register(RegisterModel model)
        {
            if (ModelState.IsValid)
            {
                // Attempt to register the user
                try
                {
                    WebSecurity.CreateUserAndAccount(model.UserName, model.Password);
                    WebSecurity.Login(model.UserName, model.Password);
                    return RedirectToAction("Index", "Home");
                }
                catch (MembershipCreateUserException e)
                {
                    ModelState.AddModelError("", ErrorCodeToString(e.StatusCode));
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }