public override void ViewDidLoad()
        {
            CurrentNavigationItem = NavigationItem;
            base.ViewDidLoad();

            TabBar.ItemSelected += NavigateOnTabBar;
            Title = Application.Locator.CourseViewModel.Course.Title;
            IdentityChanged();

            TabBar.SelectedItem = SubscribeTabBarItem;
            _tableSource        = new SubscribeTableSource(View);
            DataTable.Source    = _tableSource;

            AddParticipantButton.SetCommand("TouchUpInside", Vm.AddParticipantCommand);
            SendSubscriptionButton.SetCommand("TouchUpInside", Vm.SendSubscriptionCommand);
            Vm.Subscription.Participants.CollectionChanged += (sender, args) => DataTable.ReloadData();
        }