Polly.Contrib does not compile for us poor souls still on Framework 4.7.

[aholmes]

Polly.Contrib binaries target Framework 4.7.2, but this excludes assemblies Framework 4.7.

Solution: Add Framework 4.7 to the list of targets:

[mhornbacher]

You should be able to use the netstandard2.0 target for everything above 4.6.1 no?

https://docs.microsoft.com/en-us/dotnet/standard/net-standard