https://github.com/damienbod/AspNetCorePdf
PDFSharp .NET Standard port:
https://github.com/YetaWF/PDFsharp-.netcoreapp2.0
PDFSharp docs:
http://www.pdfsharp.net/wiki/Graphics-sample.ashx
http://www.pdfsharp.net/wiki/PDFsharpSamples.ashx
MigraDoc Original code
https://github.com/empira/MigraDoc
MigraDoc docs http://www.pdfsharp.net/wiki/MigraDocSamples.ashx