BgEngine.Controllers.SubscriptionController.SubscribeToNewsletter C# (CSharp) Method

        public ActionResult SubscribeToNewsletter()
        {
            if (CodeFirstSecurity.IsAuthenticated)
            {
                string username = CodeFirstSecurity.GetUserMail(CodeFirstSecurity.CurrentUserName);
                Subscription subscription = SubscriptionServices.FindAllEntities(s => s.SubscriberEmail == username,null,null).FirstOrDefault(s => s.SubscriptionType == SubscriptionType.Newsletter);
                if (subscription == null)
                {
                    return PartialView();
                }
                else
                {
                    return new EmptyResult();
                }
            }
            return PartialView(new SubscriptionViewModel());
        }