using System;

using System.IO;

using System.Text;

using System.Xml;

public class Program

{

    string GetXML()

    {

        string s = "<?xml version=\"1.0\"?> \n" +

    "<books xmlns=\"http://www.contoso.com/books\"> \n" +

    "  <book genre=\"novel\" ISBN=\"1-861001-57-8\" publicationdate=\"1823-01-28\"> \n" +

    "    <title>Pride And Prejudice</title> \n" +

    "    <price>24.95</price> \n" +

    "  </book> \n" +

    "  <book genre=\"novel\" ISBN=\"1-861002-30-1\" publicationdate=\"1985-01-01\"> \n" +

    "    <title>The Handmaid's Tale</title> \n" +

    "    <price>29.95</price> \n" +

    "  </book> \n" +

    "</books>";

        return s;

    }

    public static void Main()

    {

        Program p =new Program();

        Console.WriteLine("Hello World");

        var xmlReader = XmlReader.Create(new StringReader(p.GetXML()));

              var xmlString = p.Reader(xmlReader);

    }

    public string Reader(XmlReader xmlTextReader)

        {

            var stringBuilder = new StringBuilder();

            while (xmlTextReader.Read())

            {

                switch (xmlTextReader.NodeType)

                {

                    case XmlNodeType.Element:

                        var tag = ">";

                        if (xmlTextReader.IsEmptyElement)

                        {

                            tag = "/>";

                        }

                        // Console.Write("<" + xmlTextReader.Name);

                        stringBuilder.Append("<").Append(xmlTextReader.Name);

                        while (xmlTextReader.MoveToNextAttribute())

                        {

                            // Console.Write(" " + xmlTextReader.Name + "='" + xmlTextReader.Value + "'");

                            stringBuilder.Append(" ").Append(xmlTextReader.Name).Append("='")

                                .Append(EscapeCharacters(xmlTextReader.Value)).Append("'");

​

                        }

                        // Console.WriteLine(tag);

                        stringBuilder.AppendLine(tag);

                        break;

                    case XmlNodeType.Text:

                        // Console.WriteLine (xmlTextReader.Value);

                        stringBuilder.AppendLine(EscapeCharacters(xmlTextReader.Value));

                        break;

                    case XmlNodeType.EndElement:

                        // Console.WriteLine("</" + xmlTextReader.Name);

                        // Console.WriteLine(">");

                        stringBuilder.AppendLine("</" + xmlTextReader.Name + ">");

                        break;

                    case XmlNodeType.None:

                        // Console.WriteLine("None");

                        break;

                    case XmlNodeType.Attribute:

                        // Console.WriteLine("Attribute");

                        break;

                    case XmlNodeType.CDATA:

                        // Console.WriteLine(xmlTextReader.Value);

                        stringBuilder.AppendLine(EscapeCharacters(xmlTextReader.Value));

                        break;

                    case XmlNodeType.EntityReference:

                        // Console.WriteLine("EntityRef");

                        break;

                    case XmlNodeType.Entity:

                        // Console.WriteLine("Entity");

                        break;

                    case XmlNodeType.ProcessingInstruction:

                        // Console.WriteLine("Processing Instruction");

                        break;

                    case XmlNodeType.Comment:

                        // Console.WriteLine("Comment");

                        break;

                    case XmlNodeType.Document:

                        // Console.WriteLine("Document");

                        break;

                    case XmlNodeType.DocumentType:

                        // Console.WriteLine("DocumentType");

                        break;

                    case XmlNodeType.DocumentFragment:

                        // Console.WriteLine("Document Fragment");

                        break;

                    case XmlNodeType.Notation:

                        // Console.WriteLine("Notation");

                        break;

                    case XmlNodeType.Whitespace:

                        // Console.WriteLine("Whitespace");

                        break;

                    case XmlNodeType.SignificantWhitespace:

                        // Console.WriteLine("SignificantWhitespace");

                        break;

                    case XmlNodeType.EndEntity:

                        // Console.WriteLine("EndEntity");

                        break;

                    case XmlNodeType.XmlDeclaration:

                        // Console.WriteLine("XmlDeclaration");

                        break;

                    default:

                        throw new ArgumentOutOfRangeException();

                }

            }

​

            return stringBuilder.ToString();

        }

        private static string EscapeCharacters(string value)

        {

            if (string.IsNullOrEmpty(value))

            {

                return null;

            }

​

            foreach (var escapeChar in EscapeCharactersMap)

            {

                value = value.Replace(escapeChar.Key, escapeChar.Value);

            }

​

            return value;

        }

}