https://github.com/lunet-io/markdig
This one is looking the favourite as it seems really really fast! However, it's only going to be truly awesome if I can get it to render on the fly, so as soon as a markdown file is altered it then automatically renders that to html in the controller action.
nuget library: Install-Package Markdig -Version 0.15.7
https://github.com/wkallhof/iron-beard
Although initially this one looked good, it seems to want to run as an ongoing service watching files for changes, which is a bit weird.
Also the chain of getting it implemented is weird, I'm not liking this new world of 'run this simple dotnet command to do a thing!'.
I kinda like to actually do the implementation if that's alright with everyone else...
nuget library dotnet tool install --global IronBeard --version 1.0.45 (thats really not a nuget library...)