public partial class CollectionView : UserControl
    {
        public static readonly DependencyProperty TasksProperty = DependencyProperty.Register(
            "Tasks", typeof (CommonBarItemCollection), typeof (CollectionView), new PropertyMetadata(default(CommonBarItemCollection)));

        public CommonBarItemCollection Tasks
        {
            get { return (CommonBarItemCollection) GetValue(TasksProperty); }
            set { SetValue(TasksProperty, value); }
        }

        public CollectionView()
        {
            InitializeComponent();

            SetValue(TasksProperty, new CommonBarItemCollection(tasksPageGroup, tasksPageGroup.ItemLinks));
        }


        private void CollectionView_OnLoaded(object sender, RoutedEventArgs e)
        {
            foreach (var itemLink in Tasks.Cast<BarItemLink>())
            {
                tasksPageGroup.ItemLinks.Add(itemLink);
            }
        }
    }