public async Task NotifyUser(NotificationDto notification, string username) { var not = await notificationsManager.AddNotificationToUser(notification, username); var user = WikiTriviaHandler.connectedUsers.SingleOrDefault(u => u.Username == username); if (user == null) { return; } var context = GlobalHost.ConnectionManager.GetHubContext <NotificationsHub>(); context.Clients.Client(user.ConnectionId).notify(not); }