Реально ли написать PDF reader

using System;
using System.Diagnostics;
using System.IO;
using PdfSharp;
using PdfSharp.Drawing;
using PdfSharp.Pdf;
using PdfSharp.Pdf.IO;
 
namespace HelloWorld
{
  /// <summary>
  /// This sample is the obligatory Hello World program.
  /// </summary>
  class Program
  {
    static void Main(string[] args)
    {
      // Create a new PDF document
      PdfDocument document = new PdfDocument();
      document.Info.Title = "Created with PDFsharp";
 
      // Create an empty page
      PdfPage page = document.AddPage();
 
      // Get an XGraphics object for drawing
      XGraphics gfx = XGraphics.FromPdfPage(page);
 
      // Create a font
      XFont font = new XFont("Verdana", 20, XFontStyle.BoldItalic);
 
      // Draw the text
      gfx.DrawString("Hello, World!", font, XBrushes.Black,
        new XRect(0, 0, page.Width, page.Height),
        XStringFormats.Center);
 
      // Save the document...
      const string filename = "HelloWorld.pdf";
      document.Save(filename);
      // ...and start a viewer.
      Process.Start(filename);
    }
  }
}