Xunit: 3.0: Allow extensions to support the desktop CLR with only a netstandard assembly

[adamralph]

Currently xBehave.net ships both net452 and netstandard1.1 execution assemblies, matching those shipped by xUnit.net. This is required to support test assemblies targeting net452 (and later).

I would prefer to ship a single netstandard execution assembly, and have that used when running on the desktop CLR. This would make my build and test simpler and quicker, and it would allow me to perform a full CI build on a Linux machine.

[bradwilson]

That is definitely the current plan of record. Only the runners themselves should be platform-specific.

[bradwilson]

Gonna close this now because we have definitely landed far enough into v3 and it's clear that the core framework will be only netstandard2.0. Only the runner libraries include net472 (and only then because of v1/v2 back compat).

[adamralph]

🎉 Great to hear @bradwilson