public ActionResult ChangeRole(string userName, string role)
{
var user = Logic.Find(u => u.UserName == userName);
var oldRoleId = user.Roles.SingleOrDefault().RoleId;
var oldRoleName = Logic.GetRole(oldRoleId).Name;
if (oldRoleName != role)
{
UserManager.RemoveFromRole(user.Id, oldRoleName);
UserManager.AddToRole(user.Id, role);
Logic.ModifyUser(user);
}
return(RedirectToAction("Index"));
}