public ActionResult UnassignOwnerShip(String userName, String roleName)
{
MembershipUser user = Membership.GetUser(userName);
AuthenticationsAndAuthorizationsOperations aNaOps = new AuthenticationsAndAuthorizationsOperations();
aNaOps.RemoveRoleOwnership(userName, roleName);
return(RedirectToAction("EditRole", new { roleName = roleName }));
}