所选节点及其父节点如何相同?你的逻辑是错误的.如果要检查是否选择了节点，则必须检查SelectedNode是否为空(VB中没有).

How can a selected node and it''s parent be the same? Your logic is wrong. If you wish to check if a Node is selected or not, you have to check if the SelectedNode is null (Nothing in VB).