HandyControl TagContainer

   public class TagContainer1 : ItemsControl
    {
        public TagContainer1()
        {
            AddHandler(HandyControl.Controls.Tag.ClosedEvent, new RoutedEventHandler(Tag_OnClosed));
        }

        public object CloseTag;
        private void Tag_OnClosed(object sender, RoutedEventArgs e)
        {
            if (e.OriginalSource is HandyControl.Controls.Tag Tag1)
            {
                CloseTag = null;
                var r = ShowMsgUtil.Question($"确定删除[{Tag1.Content}]吗?");
                if (r != MessageBoxResult.Yes) return;
                Tag1.Hide();
                CloseTag = Tag1.DataContext;
                if (ItemsSource == null)
                {
                    Items.Remove(Tag1);
                }
                else
                {
                    var item = ItemContainerGenerator.ItemFromContainer(Tag1);
                    GetActualList()?.Remove(item);
                    Items.Refresh();
                }
            }
        }

        internal IList GetActualList()
        {
            IList list;
            if (ItemsSource != null)
            {
                list = ItemsSource as IList;
            }
            else
            {
                list = Items;
            }

            return list;
        }

        protected override DependencyObject GetContainerForItemOverride() => new HandyControl.Controls.Tag();

        protected override bool IsItemItsOwnContainerOverride(object item) => item is HandyControl.Controls.Tag;
    }