Treeview Dynamically populate and remove Hyperlinks from nodes using asp.net c#

//Html

<asp:TreeView ID="TreeView1" ShowCheckBoxes="All" runat="server" NodeIndent="15"   >

                            <HoverNodeStyle Font-Underline="True" ForeColor="#6666AA" />

                            <NodeStyle Font-Names="Arial" Font-Size="9pt" ForeColor="Black" HorizontalPadding="1px"

                                NodeSpacing="0px" VerticalPadding="1px" ></NodeStyle>

                            <ParentNodeStyle Font-Bold="False" />

                        </asp:TreeView>

//Remove Hyperlinks

System.Web.UI.WebControls.TreeView RemoveHyperLinks(System.Web.UI.WebControls.TreeView treeView, TreeNodeCollection treeNodes)

    {

        foreach (TreeNode node in treeNodes)

        {

            node.SelectAction = TreeNodeSelectAction.None;//here the link is removed

            if (node.ChildNodes != null && node.ChildNodes.Count > 0)

            {

                treeView = RemoveHyperLinks(treeView, node.ChildNodes);

            }

        }

        return treeView;

    }

//Populate Treeview Dynamically

    private void PopulateTreeView(DataTable dtParent, string parentId, TreeNode treeNode)

    {

        foreach (DataRow row in dtParent.Rows)

        {

            if (parentId == "")

            {

                TreeNode child = new TreeNode

                {

                    Text = row["InterventionType"].ToString(),

                    Value = row["InterventionID"].ToString()

                };

                TreeView1.Nodes.Add(child);

                DataTable dtChild = this.GetData("");

                PopulateTreeView(dtChild, Convert.ToString(child.Value), child);

            }

            else

            {

                TreeNode child1 = new TreeNode

                {

                    Text = row["ActivityName"].ToString(),

                    Value = row["ActivityID"].ToString()

                };

                treeNode.ChildNodes.Add(child1);

            }

            TreeView1.CollapseAll();

            RemoveHyperLinks(TreeView1, TreeView1.Nodes);

        }

    }