public EFMessagesRepository( ApplicationDbContext applicationContext, UserManager <ApplicationUser> userManager, INotificator <Chat, IMessagesRepository> notificatorChat, INotificator <Notification, IMessagesRepository> notificatorNotification) { _userManager = userManager; _applicationContext = applicationContext; _notificatorChat = notificatorChat; _notificatorNotification = notificatorNotification; _notificatorChat.Subscribe(this); _notificatorNotification.Subscribe(this); }