using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Xml;        

using System.Xml.Schema; 

namespace XmlValidator

{

    class Validator

    {

        static void Main(string[] args)

        {

            string dtdFile = string.Empty;

            string xmlFile = string.Empty;

            if (args.Length == 2)

            {

                dtdFile = args[0];

                xmlFile = args[1];

            }

            else

            {

                Console.WriteLine("Usage: XmlValidator.exe dtdfile.dtd xmlfile.xml");

                return;

            }

            try

            {

                XmlReaderSettings settings = new XmlReaderSettings();

                settings.ValidationType = ValidationType.DTD;

                settings.ValidationEventHandler += XmlValidationEventHandler;

                settings.ProhibitDtd = false;

                XmlReader xmlReader = XmlReader.Create(xmlFile, settings);

                while (xmlReader.Read())

                {

                    // Do nothing

                }

                xmlReader.Close();

            }

            catch (XmlException /* xmle */)

            {

                Console.Write("Not valid");

                return;

            }

            catch (System.IO.FileNotFoundException ex)

            {

                Console.WriteLine("File not found!");

                Console.WriteLine(ex.Message);

                return;

            }

            if (isValid)

            {

                Console.Write("Valid");

            }

            else

            {

                Console.Write("Not valid");

            }

        }

        public static void XmlValidationEventHandler(object sender, ValidationEventArgs args)

        {

            isValid = false;

//            Console.WriteLine("Validation event\n" + args.Message);

        }

        private static bool isValid = true;

    }

}