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An Example of Calling the First Ancestors Prototype

using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {     public static void Main() {         XElement xDocument = new XElement(new XElement("Books",          new XElement("Book",            new XAttribute("type", "Author"),            new XElement("FirstName", "J"),           new XElement("LastName", "R")),          new XElement("Book",           new XAttribute("type", "Author"),           new XElement("FirstName", "E"),           new XElement("LastName", "B"))));         IEnumerable<XElement> elements =          xDocument.Element("Books").Descendants("FirstName");         foreach (XElement element in elements) {             Console.WriteLine("Source element: {0} : value = {1}",              element.Name, element.Value);         }         foreach (XElement element in elements.Ancestors()) {             Console.WriteLine("Ancestor element: {0}", element.Name);         }     } }