分割PDF并保存，但访问被拒绝

Question

我正在尝试将pdf文件拆分为单独的pdf。我无法弄清楚为什么继续让我访问该路径被拒绝错误。我将用户名设置为admin，并对文件夹进行完全控制。

        public void ExtractPage()
    {

        string sourcePdfPath = "C:\\SOURCECODE\\OAPdfSplitter\\OAPdfSplitter\\PDFSource\\Xerox Scan_05022019151254.PDF";
        string outputPdfPath = "C:\\SOURCECODE\\OAPdfSplitter\\OAPdfSplitter\\PDFOutput";
        int pageNumber = 1;

        PdfReader reader = null;
        Document document = null;
        PdfCopy pdfCopyProvider = null;
        PdfImportedPage importedPage = null;

        try
        {
            reader = new PdfReader(sourcePdfPath);
            document = new Document(reader.GetPageSizeWithRotation(pageNumber));

        pdfCopyProvider = new PdfCopy(document,new System.IO.FileStream(outputPdfPath, System.IO.FileMode.Create));

            document.Open();

            importedPage = pdfCopyProvider.GetImportedPage(reader, pageNumber);
            pdfCopyProvider.AddPage(importedPage);
            document.Close();
            reader.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "Error message:", MessageBoxButton.OK, MessageBoxImage.Error);
        }