treeview如何通过单击右键快捷菜单来剪切复制粘贴内容？请各位帮帮忙！谢了！

悬赏园豆：10 [待解决问题]

右健

代码如下：
TreeNode treeNodeClone =new TreeNode ();
private void 复制ToolStripMenuItem2_Click(object sender, EventArgs e)
{
if (elementtreeView .SelectedNode != null)
{
treeNodeClone = (TreeNode)elementtreeView.SelectedNode.Clone();

}

}

private void 剪切ToolStripMenuItem2_Click(object sender, EventArgs e)
{
if (elementtreeView.SelectedNode != null)
{
treeNodeClone = (TreeNode)elementtreeView.SelectedNode.Clone();
this.elementtreeView.SelectedNode.Remove();

}
}

private void 粘贴ToolStripMenuItem2_Click(object sender, EventArgs e)
{
if (elementtreeView.SelectedNode.Nodes.Count == 0)
{
elementtreeView.SelectedNode.Nodes.Add(treeNodeClone);
}
else
{
elementtreeView.Nodes.Add(treeNodeClone);
}