public void AttributeChanged(AttributeChangedEventArgs e)
{
Console.WriteLine("<>A: {0}", e.XPath);
Console.WriteLine(" o: {0,-8}: {1}", e.LeftLineNumber, e.LeftAttribute.Value);
Console.WriteLine(" n: {0,-8}: {1}", e.RightLineNumber, e.RightAttribute.Value);
Console.WriteLine();
}