open pdf in csharp

main.cs
using System.IO;
using iTextSharp.text.pdf;
using iTextSharp.text;

class Program {
  static void Main(string[] args) {
    string pdfFilePath = "path/to/your/file.pdf";
    if (File.Exists(pdfFilePath)) {
      PdfReader pdfReader = new PdfReader(pdfFilePath);
      for (int page = 1; page <= pdfReader.NumberOfPages; page++) {
        // get page size
        Rectangle pageSize = pdfReader.GetPageSize(page);
        // create document object
        Document pdfDocument = new Document(pageSize);
        // create PDF writer
        PdfWriter pdfWriter = PdfWriter.GetInstance(pdfDocument, new FileStream($"page{page}.pdf", FileMode.Create));
        // open the document
        pdfDocument.Open();
        // add the page to the document
        PdfImportedPage importedPage = pdfWriter.GetImportedPage(pdfReader, page);
        PdfContentByte pdfContentByte = pdfWriter.DirectContent;
        pdfContentByte.AddTemplate(importedPage, 0, 0);
        // close the document
        pdfDocument.Close();
      }
      // close the reader
      pdfReader.Close();
    } else {
      Console.WriteLine($"File '{pdfFilePath}' not found.");
    }
  }
}
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