Hello,
Thanks for your inquiry!
Sorry that I did not see the screenshot you attached. I tested printing the file you provided through Adobe and Spire.PDF for net, here I also attached the results I printed. But I did not find any different between your file and the print result of Spire.PDF, or the difference between the printed result of Spire.PDF and Adobe.
doubledashesinyourfile.png
printCompare.jpg
Which version of Spire.PDF are you using? If you are not using our latest Spire.PDF for net version 7.11.1, I recommend that you can try it and print again.
If the issue still exists after using the latest version, please provide us with your screenshot with the different pointed out, the target framework of your project (E.g. .net framework 4.8.0), your system information (E.g. Win7, 64 bit) and region setting (E.g. China, Chinese) for reference. Thanks in advance.
Sincerely,
Marcia
E-iceblue support team
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