Lire le texte contenu dans un fichier pdf avec C Sharp

using System;

using iTextSharp.text.pdf;          //*iTextSharp
using iTextSharp.text.pdf.parser;   //*iTextSharp Text-Reader
using System.IO; //Pour les fichiers

namespace LirePdf
{
    class Program
    {
        static void Main(string[] args)
        {
            //Console.WriteLine("Hello World!");

            var fileName = @"C:\aaa.txt";

            using FileStream objFileStream = File.Create(fileName);
            using var objStreamWriter = new StreamWriter(objFileStream);

            String sFilename = @"C:\Exemple.pdf";
            String sText = "";

            PdfReader pdf_Reader = new PdfReader(sFilename);

            for (int i = 1; i <= pdf_Reader.NumberOfPages; i++)
            {
                sText = PdfTextExtractor.GetTextFromPage(pdf_Reader, i);
                objStreamWriter.WriteLine(sText);
                Console.WriteLine(sText);
            }

        }
    }
}

using System;

//using iTextSharp;
using iTextSharp.text;
using iTextSharp.text.pdf;          //*iTextSharp
//using iTextSharp.text.pdf.parser;   //*iTextSharp Text-Reader
using System.IO; //Pour les fichiers

namespace CreatePDF
{
    class Program
    {
        static void Main(string[] args)
        {
            //Console.WriteLine("Hello World!");

            var fileName = @"C:\aaaa.pdf";

            using FileStream objFileStream = File.Create(fileName);

            //using var objStreamWriter = new StreamWriter(objFileStream);

            //System.IO.FileStream fs = new FileStream(Server.MapPath("pdf") + "\\" + "First PDF document.pdf", FileMode.Create)

            // Create an instance of the document class which represents the PDF document itself.  
            Document document = new Document(PageSize.A4, 25, 25, 30, 30);
            // Create an instance to the PDF file by creating an instance of the PDF   
            // Writer class using the document and the filestrem in the constructor.  
            PdfWriter writer = PdfWriter.GetInstance(document, objFileStream);

            // Add meta information to the document  
            document.AddAuthor("Test");
            document.AddCreator("Test using iTextSharp");
            document.AddKeywords("test");
            document.AddSubject("test");
            document.AddTitle("test");

            // Open the document to enable you to write to the document  
            document.Open();
            // Add a simple and wellknown phrase to the document in a flow layout manner  
            document.Add(new Paragraph("Hello World Baby !"));
            // Close the document  
            document.Close();
            // Close the writer instance  
            writer.Close();
            // Always close open filehandles explicity  
            objFileStream.Close();

        }
    }
}