Hello everybody,
When I try to read an XML file with XmlTextReader() method I get the System.Xml.XmlException.
My code is like this:

using System;
using System.IO;
using System.Xml;

public class Sample
{

  public static void Main()
   {
     XmlTextReader reader = new XmlTextReader(".\\.\\Books.xml");
     reader.WhitespaceHandling = WhitespaceHandling.None;

  while (reader.Read()) // Here where the error occurs.

{
    switch (reader.NodeType)
    {
     case XmlNodeType.Element:
     //
         break;
    case XmlNodeType.Text:
    //
        break;
    case XmlNodeType.EndElement:
        //
        break;
    case XmlNodeType.SignificantWhitespace:
    //
    break;
    }
  }
 }
}

your xml file must be not in the right form.