static void Main(string[] args)
        {
            TextDocument doc = new TextDocument();

            Paragraph p1 = new Paragraph();

            p1.Add("Hello World");

            doc.Body.Add(p1);

            Text bookmarkText = new Text("Some text here");

            BookmarkStart bookmarkStart = new BookmarkStart();

            bookmarkStart.Name = "BookmarkName";
            bookmarkStart.Add(bookmarkText);

            BookmarkEnd bookmarkEnd = new BookmarkEnd();

            bookmarkEnd.Name = "BookmarkName";

            p1.Add(bookmarkStart);
            p1.Add(bookmarkEnd);

            doc.Save("c:\\test\\output.odt", true);
        }