I develop a Web Service that utilizes PdfFileEditor.Concatenate to join several PDF files. The service is vanilla plain C# Visual Studio 2008 Windows Service (what is built by the wizard) and runs under IIS/Windows XP. When I set its Authentication Method to Integrated Windows Authentication in the Properties/Directory Security/Edit dialog - it runs OK. However when I change it to Anonymous - it generates an empty PDF file.
I have tested this issue at my end on Windows XP according to your shared specifications, however I couldn’t notice any issue at my end. Can you please share the Web Service project along with the sample files you’re having problem with, so I would be able to test the issue with your particular scenario? You’ll be updated accordingly.
We’re sorry for the inconvenience.