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XPathNavigator SelectAncestors selects all the ancestor nodes of the current

using System; using System.Linq; using System.Xml; using System.Xml.Linq; using System.Collections; using System.Collections.Generic; using System.Xml.XPath; public class MainClass {     public static void Main()     {         XPathDocument document = new XPathDocument("domainBooks.xml");         XPathNavigator navigator = document.CreateNavigator();         navigator.MoveToChild("bookstore", "http://www.domain.com/books");         navigator.MoveToChild("book", "http://www.domain.com/books");         XPathNodeIterator bookDescendants = navigator.SelectDescendants("", "http://www.domain.com/books", false);         while (bookDescendants.MoveNext())         {             Console.WriteLine(bookDescendants.Current.Name);         }         XPathNodeIterator bookChildren = navigator.SelectChildren("", "http://www.domain.com/books");         while (bookChildren.MoveNext())         {             Console.WriteLine(bookChildren.Current.Name);         }         navigator.MoveToChild("title", "http://www.domain.com/books");         XPathNodeIterator bookAncestors = navigator.SelectAncestors("", "http://www.domain.com/books", false);         while (bookAncestors.MoveNext())         {             Console.WriteLine(bookAncestors.Current.Name);         }     } }