C# 基于子节点计算父节点值'；s值

我将使用枚举整数值，通过添加int值并与子节点计数进行比较，得出父节点上的状态（无、等于或包含）。我将感谢任何帮助和提前感谢

public static void SelectionSetContainment(Node<SelectionSetCheckNode> root, NW.ModelItemCollection currentSelection)
{
        foreach (Node<SelectionSetCheckNode> savedItem in root.Children)
        {
            var node = savedItem.Value.SavedItem;

            if (node is NW.SelectionSet selectionSet)
            {
                var selectionSetItems = selectionSet.GetSelectedItems();

                if (currentSelection.IsContentsIntersected(selectionSetItems))
                    savedItem.Value.State = currentSelection.IsSelected(selectionSetItems) ? CheckState.Equals : CheckState.Contains;
            }
            else if (node is NW.FolderItem)
                SelectionSetContainment(savedItem, currentSelection);
        }
}

        false
      /   |    \
    true true   false
   /   \
true  true