You will not be able to print reliably, spawning Acrobat Reader, if you do not have a session on the desktop, and the user will be there, because sometimes dialog boxes pop up that require the user's attention.
It also violates the Adobe license if used unattended.
However, you can print using Ghostscript.
There is a C # interface for Ghostscript called Ghostscript.Net, which I have successfully used in some very large projects. Both Ghostscript and Ghostcript.Net are free and open source.
Terry carmen
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