.Net Standard 1.X is possible to compile on later versions of .Net standard like .Net Standard 2.0, but Paket generate conditional loading of assemblys that mean that I on .Net Framework 4.7.2 does not get any assembly loaded at all.
An example would be that System.IO.Compression https://www.nuget.org/packages/System.IO.Compression/#supportedframeworks-body-tab is written for .Net Standard 1.3 and this imply compability with up to .Net Standard 2.1, but Paket give a Project file that ignore to load the assembly unless you explicity target the older versions.
Description
.Net Standard 1.X is possible to compile on later versions of .Net standard like .Net Standard 2.0, but Paket generate conditional loading of assemblys that mean that I on .Net Framework 4.7.2 does not get any assembly loaded at all.
An example would be that System.IO.Compression https://www.nuget.org/packages/System.IO.Compression/#supportedframeworks-body-tab is written for .Net Standard 1.3 and this imply compability with up to .Net Standard 2.1, but Paket give a Project file that ignore to load the assembly unless you explicity target the older versions.
The rules of .Net Standard can be found on https://learn.microsoft.com/en-us/dotnet/standard/net-standard?tabs=net-standard-1-0
Repro steps
Please provide the steps required to reproduce the problem
Create a solution using .Net Framework 4.7.2
Add reference to System.IO.Compression
Write som code that depend on ZipArchive, but without the assembly loaded the code does not compile
Expected behavior
Paket should generate conditional assembly loading that respect .Net Standard compability guarantees so you can compile the code.
Actual behavior
You get a Project that must target lower version of the standard to compile
Known workarounds
If you manually add an assembly reference to the library, that is basically stop using Paket for Nuget paket, you can compile the code.