public ActionResult Conversations()
        {
            var iam=db.Users.Where(u=>u.Login==User.Identity.Name).FirstOrDefault();
            User friend;
            Message msg;

            var conversations = db.Conversations.Where(con => con.UserOne == iam.Id || con.UserTwo == iam.Id);
            List<ConversationViewModel> model = new List<ConversationViewModel>();
            foreach (var item in conversations)
            {
                using (DatabaseContext db1 = new DatabaseContext())
                {
                    msg = db1.Messages.Where(m => m.ConversationId == item.Id).ToList().LastOrDefault();
                    if (msg == null)
                    {
                        msg = new Message() { Text = " " };
                    }
                    if (iam.Id == item.UserOne)
                    {
                        friend = db1.Users.Include("Profile").Where(u => u.Id == item.UserTwo).FirstOrDefault();
                    }
                    else
                    {
                        friend = db1.Users.Include("Profile").Where(u => u.Id == item.UserOne).FirstOrDefault();
                    }

                    model.Add(new ConversationViewModel()
                    {
                        Id=item.Id,
                        Iam = iam,
                        Friend = friend,
                        Messages = new List<Message>() { msg }
                    });
                }
            }
            return View(model);
        }
 public ActionResult Send(Message model,int? idConversation,string returnUrl)
 {
     if (ModelState.IsValid)
     {
         var iam = db.Users.Where(u => u.Login == User.Identity.Name).FirstOrDefault();
         db.Messages.Add(new Message()
         {
             Text = model.Text,
             Time = DateTime.Now,
             UserId = iam.Id,
             Ip = Request.UserHostAddress,
             ConversationId = (int)idConversation
         });
         db.SaveChanges();
         return Redirect(returnUrl);
     }
     else
     {
         return View(model);
     }
 }