If you pass the file path of the PDF file you have just created to Process.Start instead of trying to launch Acrobat Reader, Windows will open the PDF with the default application associated with the .pdf file extension. You will not even need to know what reader they have installed. If no reader is installed, Windows will prompt the user to choose an application to open it with. This is a better option that launching Acrobat Reader directly as it will open the PDF file with the user's preferred reader.