Validating XML with DTD or XSD

public void ValidateXMLagainstDTD(Stream thestream)

{

XmlTextReader reader = new XmlTextReader(thestream);

XmlValidatingReader validator = new XmlValidatingReader(reader);

validator.ValidationType = ValidationType.DTD;

validator.ValidationEventHandler += new ValidationEventHandler(DTDValidationEventHandler);

while (validator.Read())

{

//add something logical here

}

validator.Close();

if (Isvalid)

Console.WriteLine("Document is valid");

else

Console.WriteLine("Document is Invalid");

Console.ReadLine();

}

public void DTDValidationEventHandler(object sender,

ValidationEventArgs args)

{

this.Isvalid = false;

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

}