jvlinton wrote:
Do you have a recommended process for converting an entirely color PDF into a black and white PDF using PDFSharp?
I know this is basic but having trouble finding the information.
As far as I know, this is not basic at all. You would have to process the contents of each page, looking for colour operations, and change those to equivalent operations using greyscale (or even black & white). Also, you would need to replace each image with a greyscale version and update the ColorSpace entry in its metadata. As PdfSharp does not provide access to inline images, you cannot convert those at the moment.
For starters, you could try
http://greyscalepdf.com/ and see what it changes in the processed PDF. It apparently uses Ghostscript for the conversion. But I've noticed that that site does not always convert everything to greyscale; sometimes it leaves a bit of colour.