Load XML string with XDocument

using System;/* j ava2s.  c  o  m*/
using System.IO;

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

public class MainClass
{
    public static void Main()
    {

        TextReader sr;
        int whiteSpaceNodes;


        sr = new StringReader("<Root> <Child> </Child> </Root>");
        XDocument xmlTree2 = XDocument.Load(sr, LoadOptions.PreserveWhitespace);
        sr.Close();
        whiteSpaceNodes = xmlTree2
            .Element("Root")
            .DescendantNodesAndSelf()
            .OfType<XText>()
            .Where(tNode => tNode.ToString().Trim().Length == 0)
            .Count();
        Console.WriteLine(whiteSpaceNodes);
    }
}