System.Windows.Controls.SelectionMultiple.SelectFirstFromKey C# (CSharp) Метод

        public bool SelectFirstFromKey()
        {
            List<MultiSelectTreeViewItem> items = MultiSelectTreeView.RecursiveTreeViewItemEnumerable(treeView, false, false).ToList();
            MultiSelectTreeViewItem item = treeView.GetFirstItem(items);
            return SelectFromKey(item);
        }