Aspose.Pdf.Facades.PdfFileInfo info = new Aspose.Pdf.Facades.PdfFileInfo();<o:p></o:p>
var privilege = info.GetDocumentPrivilege();
I have noticed that you are using old Aspose.Pdf.Facades Approach which will be obsolete soon. We strongly recommend to use new Document Object Model (DOM) approach. You may check Aspose.Pdf (DOM) section in our API docs. In case if you need further assistance please feel free to contact us.