// build the <body> element
        public void BuildBody(string textIn)
        {
            // add a top-level heading containing the title
            doc.AppendToBody(new HtmlHeading(1, title));

            // add a second-level heading containing the author
            doc.AppendToBody(new HtmlHeading(2, "by " + author));

            // add a paragraph containing the text
            doc.AppendToBody(new HtmlParagraph(textIn));
        }