How to set an owner password and a user password to a PDF file?

You can set an owner/permissions/master password and a user/open password for a PDF files at the same time. Below is a sample showing how to set both types of passwords for one PDF file:

To download the tool, please click VeryPDFToobox.

using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Call_PDFToolBoxCom
    class Program
        static void Main(string[] args)
            string strExePath = System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase;
            PDFToolBoxCom.PDFToolBoxCom p = new PDFToolBoxCom.PDFToolBoxCom();
            string strReturn = p.RunCMD(strExePath + @"\1.pdf -outfile "+ strExePath + @"\out.pdf  -ownerpassword opwd -userpassword upwd");
            Console.WriteLine("Please enter any key to continue...");

Lear more: VeryPDF PDF Toolbox Component for .NET.

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