HelloWorldWithSecurity_HiPrintRemoved

using System;
using System.Collections.Generic;
using System.Text;
using Bytescout.PDF;
namespace HelloWorldWithSecurity_HiPrintRemoved
{
  class Program
  {
    static void Main(string[] args)
    {
      #region Create PDF with security
      // Create main PDF Doc Engine
      PDFDocEngine engine = new PDFDocEngine("", "");
      // Add new document
      Document document = engine.AddDocument();
      // Append new page to the document
      Page page = document.AddPage(PageSizeType.A3, PageOrientationType.LandScape);
      // Create new drawing
      Drawing drawing = page.AddDrawing();
      // Add standard font
      uint font = document.AddFontStandard(StandardFontType.Courier, FontEncodingType.WinAnsi);
      // Set Active Font
      drawing.SetActiveFont(font, 50, false, false);
      // Draw Text
      drawing.PlaceText(100, 100, 0, "Hello World!");
      // Closing drawing on the page
      drawing.Close();
      document.AddProtection(DocumentPermissionType.AssembleDocument | DocumentPermissionType.CopyInformation | DocumentPermissionType.ExtractTextAndImages | DocumentPermissionType.FillAcroForm | DocumentPermissionType.ModifyAnnotation | DocumentPermissionType.ModifyContent | DocumentPermissionType.Print | DocumentPermissionType.PrintHiResolution, SecurityKeyLength._128Bit, "123", "123");
      // Save document
      document.Save("HelloWorldWithSecurity.pdf");
      #endregion
      // Add new document
      document = engine.AddDocument("HelloWorldWithSecurity.pdf");
      // check if document is protected
      if (document.Protected)
      {
        // check password 
        if (document.ValidatePassword("123") == PasswordValidationType.Invalid)
        {
          Console.WriteLine("Invalid password");
        }
        else // removing protection
          document.RemoveProtection();
      }
      // add new protection
      document.AddProtection(document.Permissions ^ DocumentPermissionType.PrintHiResolution, SecurityKeyLength._128Bit, "", "");
      // Save document
      document.Save("HelloWorldWithSecurity_HiPrintRemoved.pdf");
    }
  }
}