System.Windows.Controls.SelectionMultiple.GetFocusedItem C# (CSharp) Method

        private MultiSelectTreeViewItem GetFocusedItem()
        {
            foreach (var item in MultiSelectTreeView.RecursiveTreeViewItemEnumerable(treeView, false, false))
            {
                if (item.IsFocused) return item;
            }
            return null;
        }