XML Transform
private XmlReader ProcessOrder(DataSet ds) {
// Get an XML view of the data
XmlDataDocument xmlData = new XmlDataDocument(ds);
DataDocumentNavigator xmlNavigator =
new DataDocumentNavigator(xmlData);
XslTransform xsltransform = new XslTransform();
xsltransform.Load("product.xsl";);
return xsltransform.Transform(xmlNavigator, null);