in the Directory.Build.props there is this line:

<FullVersion>$([System.IO.File]::ReadAllText("version.txt"))</FullVersion>

which points to a non-existing file.

This doesn't work on Mac. You cannot even open the solution.

This is not a supported use case. Please use a nuget package.

To elaborate, now that I have a bit more time: This file is part of the repo and the respective code expects that to be the root of the build process. It should be possible to adjust the build props to use its own directory as the source of the lookup, but this will still not be a supported scenario.

@matthiasburger TL;DR; you can completely remove that line and later add your own versioning if needed.

This should be fixed now.

@filmor thanks for fixing it :)

just to clarify, of course this scenario is not supported. But as long as I don't want to make custom changes on your code it's much easier to clone and pull changes instead of creating a fork and merge your changes every time :D