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Checking NuGet.org
If you head over to NuGet.org and search for the package you depend on, there you can click to expand the Dependencies heading which will list all the targets. Here’s an example of the MediatR package.
I Can has .NET Core
The folks at Octopus Deploy released icanhasdot.net. Here’s what how it works:Upload your project’s packages.config, project.json, paket.dependencies and *.csproj files for analysis and we will build a visualization of the packages and whether .NET Standard versions are available on nuget.orgGive it try to see which NuGet packages you consume that are targeting .NET Standard. Another interesting feature on the site is the Statistics page which shows Unsported and Supported packages that have been scanned. I really am amazed how many library authors picked up on and supported .NET Standard.