How to delete a selected xml data from an xml file?

protected void DeleteXmlRecord(object sender, EventArgs ee)
{
    XmlDocument docXml = new XmlDocument();

    docXml.Load(Server.MapPath(@"App_Data\TestXmlFile.xml"));
    XmlNode node = docXml.DocumentElement.ChildNodes.Item(selectedIndexValue);
    node.ParentNode.RemoveChild(node);
    docXml.Save(Server.MapPath(@"App_Data\smallfools.xml"));

    //call the load method to load the updated data
     loadUsersXmlData();
}