Protect PDF file

Protect PDF file (set password)

using iTextSharp.text.pdf;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ProtectPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            protectPdf();
        }

        protected static void protectPdf()
        {
            //Set the file location. (get the file or save the protected file) 
            string WorkingFolder = Environment.GetFolderPath(Environment.SpecialFolder.MyMusic);
            //Get existing pdf file.
            string InputFile = Path.Combine(WorkingFolder, "ticket.pdf");
            //Save procted file in same path.
            string OutputFile = Path.Combine(WorkingFolder, "myticket.pdf");

            using (Stream input = new FileStream(InputFile, FileMode.Open))
            {
                using (Stream output = new FileStream(OutputFile, FileMode.Create, FileAccess.Write))
                {
                    PdfReader reader = new PdfReader(input);
                    PdfEncryptor.Encrypt(reader, output, true, "admin", null, PdfWriter.ALLOW_SCREENREADERS);
                }
            }
        }
    }
}