Generate PDF on the fly, from scratch, use code, XML/XSL, or a combination. Central to TallPDF.NET is a consistent and intuitive object model consisting of layout classes like document, section, text paragraph, table, header, footer, etc. Among the specializations of class paragraph is drawing. Use it to draw many types of shapes such as lines, bezier curves, and even barcodes. Use pens and brushes to draw outlines and fills.