Csharp/C Sharp/XML LINQ/XPath

Querying XML with XPath Syntax

 
using System;
using System.IO;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Schema;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument = new XDocument(
          new XElement("Books",
            new XElement("Book",
              new XAttribute("type", "Author"),
              new XElement("FirstName", "A"),
              new XElement("LastName", "B")),
           new XElement("Book",
              new XAttribute("type", "Author"),
              new XElement("FirstName", "C"),
              new XElement("LastName", "D"))));
        XElement bookParticipant = xDocument.XPathSelectElement("//Books/Book[FirstName="A"]");
        Console.WriteLine(bookParticipant);
    }
}

Select tags by name

 
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() {
        XDocument xDocument = new XDocument(
          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").Elements("Book");
        foreach (XElement element in elements) {
            Console.WriteLine("Source element: {0} : value= {1}", element.Name, element.Value);
        }
        foreach (XElement element in elements.ToArray()) {
            Console.WriteLine("Removing {0}= {1} &iexcl;�", element.Name, element.Value);
            element.Remove();
        }
        Console.WriteLine(xDocument);
    }
}