Code samples with Visual Studio solution file you can find in PdfPrinting.zip located in www.terminalworks.com/pdf-print-net/downloads
There is code of our PdfPrintLibraryTest demo application.
In that code, you can see:
How to set all available properties in PdfPrint library (PaperSource, Collate, Copies, Pages, Duplex, Print in Color, Print range, Scale document, Landscape / Portrait, Printer Resolution, Paper Size, Show Printer dialog)
How to change default printer in C# and get default values for default printer
How to get a list of available printers
How to set watermark
In our PdfPrintLibraryMultiDocumentPrintTest application you can see how to execute print multiple PDF documents as one single print job.