private void GetallChecked_TreeNote(TreeNodeCollection aNodes, ref  int TotalNodeCount, ref  List<string> listItem)

        {

            foreach (TreeNode iNode in aNodes)

            {

                if (iNode.Nodes.Count ==  && iNode.Checked==true)

                {

                    richTextBox_tabPage1.AppendText("名称：" + iNode.Name + " | " +

                            "Caption：" + iNode.Text + " | " +

                            "Index：" + iNode.Index.ToString() + "\n");

                    TotalNodeCount = TotalNodeCount + ;

                    listItem.Add(iNode.Text);

                }

                ;

                if (iNode.Nodes.Count > )

                {

                    GetallChecked_TreeNote(iNode.Nodes, ref TotalNodeCount,ref listItem);

                }

            }

        }

 private void button2_Click(object sender, EventArgs e)

        {

            int TotalNodeCount;

            List<string> listItem = new List<string>();

            TotalNodeCount=;

            richTextBox_tabPage1.AppendText("TotalNode in the treeView1_UserGroup: " + treeView1_UserGroup.GetNodeCount(true).ToString()+"\n");

            if (treeView1_UserGroup.Nodes.Count>)

            {

                GetallChecked_TreeNote(treeView1_UserGroup.Nodes, ref TotalNodeCount,ref listItem);

            }

            richTextBox_tabPage1.AppendText("Total Selected Nodes : " + TotalNodeCount.ToString() + "\n");

            richTextBox_tabPage1.AppendText("Selected Nodes : " + string.Join(",",listItem.ToArray())+ "\n");

            richTextBox_tabPage1.AppendText("Selected Nodes : " + string.Concat("'", string.Join(",", listItem.ToArray()),"'") + "\n");

            richTextBox_tabPage1.AppendText("Selected Nodes : " + string.Join(",", listItem.Select(x => "'" + x + "'").ToArray()) + "\n");

  }