This demo transforms an XML document to a PDF document using 'code behind classes'. Code behind classes are specializations of standard TallPDF.NET layout classes such as TextParagraph and Table. You can refer to these specializations from your XML document as this sample demonstrates. The specialized classes are 'Title', 'Normal', 'Bold' and 'Italic' and they represent the different styles used in the License Agreement document. The application logic is written in VB.NET.