XmlDocument customerDocument = new XmlDocument();
XmlElement customerElement = customerDocument.CreateElement("customer");
XmlElement firstNameElement = customerDocument.CreateElement("firstName");
firstNameElement.InnerText = "Paolo";
customerElement.AppendChild(firstNameElement);
customerDocument.AppendChild(customerElement);
XElement customerTag = new XElement("customer",
	new XElement("firstName", "Paolo"));
