如何用C#合并包含所有者密码的PDF文档

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

public class PdfMerger
{
    public static void MergePdfWithOwnerPassword(string outputFilePath, params string[] inputFilePaths)
    {
        using (FileStream outputStream = new FileStream(outputFilePath, FileMode.Create))
        {
            Document document = new Document();
            PdfCopy pdfCopy = new PdfCopy(document, outputStream);
            document.Open();

            foreach (string inputFilePath in inputFilePaths)
            {
                using (PdfReader pdfReader = new PdfReader(inputFilePath))
                {
                    // Check if the PDF document has an owner password
                    if (pdfReader.IsEncrypted() && pdfReader.IsOpenedWithFullPermissions)
                    {
                        // Remove the owner password
                        pdfReader.RemoveUsageRights();
                    }

                    for (int page = 1; page <= pdfReader.NumberOfPages; page++)
                    {
                        PdfImportedPage importedPage = pdfCopy.GetImportedPage(pdfReader, page);
                        pdfCopy.AddPage(importedPage);
                    }
                }
            }

            document.Close();
        }
    }
}