public ActionResult CheckForNewMessages() { var obj = Session["currentFriendId"]; int currentFriendId; if (obj == null) { Session["currentFriendId"] = 0; currentFriendId = 0; } else { currentFriendId = (int)obj; } int amountOfMessages = messageRepository.CheckForNewMessages(currentUser.UserId, currentFriendId); if (amountOfMessages <= 0) { return(null); } return(Content(amountOfMessages.ToString())); }