CSharp - Use element name with DescendantsAndSelf operator

Description

Use element name with DescendantsAndSelf operator

Demo

using System;
using System.Linq;
using System.Xml.Linq;
using System.Collections.Generic;

class Program//w w w  .  jav  a 2 s. c  om
{
    static void Main(string[] args){
        XDocument xDocument = new XDocument(
          new XElement("Books",
            new XElement("Book",
              new XAttribute("type", "Author"),
              new XComment("This is a new author."),
              new XElement("FirstName", "Joe"),
              new XElement("LastName", "Ruby")),
            new XElement("Book",
              new XAttribute("type", "Editor"),
              new XElement("FirstName", "PHP"),
              new XElement("LastName", "Python"))));
        
        IEnumerable<XElement> elements =
          xDocument.Element("Books").Elements("Book");
        
        //  First, we will display the source elements.
        foreach (XElement element in elements)
        {
          Console.WriteLine("Source element: {0} : value = {1}",
            element.Name, element.Value);
        }
        
        //  Now, we will display each source element's descendant elements.
        foreach (XElement element in elements.DescendantsAndSelf("LastName"))
        {
          Console.WriteLine("Descendant element: {0}", element);
        }
    }
}

Result

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