How to clone the child nodes in .Net

If (!Page.IsPostBack)

{

try

{

XmlDocument xmlDoc = new XmlDocument();

xmlDoc.LoadXml("" +

"NLD" +

"" +

"" +

"PL" +

"01" +

"20,00" +

"100,00" +

"130,00" +

"10,00" +

"" +

""

);

XmlNode root = xmlDoc.SelectSingleNode("//POLICYRISKS");

XmlNode root1 = xmlDoc.DocumentElement.ChildNodes.Item(1);

XmlNode clonenode = root1.CloneNode(true);

xmlDoc.DocumentElement.InsertAfter(clonenode,root1);

xmlDoc.Save(@"F:\Projects\clonebooks.xml");

}

catch(Exception Ex)

{

Response.Write(Ex.Message);

}

}