sadly .net core still lacks a good pdf library that is not priced over the top. (and at least supports building pdfs and creating pdf/a 3's.)
I'm going to need this very soon (not PDF/A 3 specifically, just PDF). A few months ago I did some research and I figure Skia[1](Sharp)[2] would end up being the base for any .NET core PDF libs. At the time, I was easily able to make a basic functioning demo for a project that ended up dying. Anyone using it in production?
[1]https://skia.org/user/sample/pdf [2]https://github.com/mono/SkiaSharp/