How to load an xml data from an xml file?

private void loadUsersXmlData()
{
    DataSet xmlData = new DataSet();
    xmlData.ReadXml(Server.MapPath(@"App_Data\TestXmlFile.xml"));

    if (xmlData.Tables.Count > 0)
    {
        GridViewXmlData.DataSource = xmlData;
        GridViewXmlData.DataBind();
    }
}