To produce the output of a document in the PDF format, we plan to use the .NET version of the open source iText library.

A simple program, which produces a PDF document using the library, is given next to make the reader understand the programming model of this library:

    using iTextSharp; 
    using iTextSharp.text; 
    using iTextSharp.text.pdf; 
    //------some code omitted 
    FileStream fs = new FileStream(@"D:abfund.pdf",   
    FileMode.Create); 
    Document document = new Document(PageSize.A4, 25, 25, 30, 30); 
    PdfWriter writer = PdfWriter.GetInstance(document, fs); 
    document.AddAuthor("Praseed Pai"); 
    document.AddCreator("iTextSharp PDF Library"); 
    document.AddTitle("PDF Demo"); 
    document.Open(); 
    PdfPTable table = new PdfPTable(2); 
    PdfPCell cell = new PdfPCell(new Phrase("A Header which spans    
    Columns")); 
    cell.Colspan = 3; 
    cell.HorizontalAlignment = 1;  
    table.AddCell(cell); 
    table.AddCell("Col 1 Row 1"); 
    table.AddCell("Col 2 Row 1"); 
    table.AddCell("Col 3 Row 1"); 
    table.AddCell("Col 1 Row 2"); 
    table.AddCell("Col 2 Row 2"); 
    table.AddCell("Col 3 Row 2"); 
    document.Add(table); 
    document.Close(); 
    writer.Close(); 
    fs.Close(); 

The preceding code will produce a PDF document with the contents given to the iTextsharp library through the iTextSharp API. Now we will focus on the creation of a DOM for storing our contents.