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Calculate the height of a paragraph in PDF

This code sample demonstrates how to use the event mechanism to calculate the height of a paragraph in a PDF. The program writes the height of the paragraph to the console.

using System;
using System.IO;

using TallComponents.PDF;
using TallComponents.PDF.Layout;
using TallComponents.PDF.Layout.Paragraphs;

namespace CalculateParagraphHeight
   class Program
      static double startY;
      static double endY;

      static void Main(string[] args)
         Document document = new Document();
         Section section = document.Sections.Add();

         section.Paragraphs.PrintParagraph += 
            new PrintParagraphEventHandler(section_PrintParagraph);

         using (FileStream file = 
            new FileStream(@"..\..\out.pdf", FileMode.Create, FileAccess.Write))

         Console.WriteLine("Height: {0:f1} points", startY - endY);

      static void section_PrintParagraph(
         ParagraphCollection sender, PrintParagraphEventArgs e)
         RtfParagraph rtf = new RtfParagraph();
         rtf.Text = File.ReadAllText(@"..\..\sample.rtf");
         rtf.EndParagraph += new EndParagraphEventHandler(rtf_EndParagraph);
         e.Paragraph = rtf;
         startY = e.Top;

      static void rtf_EndParagraph(Paragraph sender, EndParagraphEventArgs e)
         endY = e.Bottom;
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