.Net Core库应该针对哪个.Net框架？

Question

I am enjoying the "multi-target" feature of .xproj in Visual Studio 2015 which make it really easy to target multiple .Net frameworks with the same C# project. I am currently targeting .Net 4.5.2, 4.6, 4.6.1, 4.6.2, .Net Standard 1.3 and .Net Standard 1.6 and I am packaging all the DLLs in a nuget package.

Do you think this is overkill? Should I target fewer frameworks? More?

By the way, I know xproj is eventually going away in favor of .csproj, but that's what I'm using for the time being.

Answer 1

If you don't have any conditional compilation yet, then you should leave only .NET Framework 4.5.2 and .NET Standard 1.3.

The reason is simple. If the package works for .NET Framework 4.5.2, it works for all .NET Framework with a bigger version. No need to target them separately.

The same applies to .NET Standard. If the package targets .NET Standard 1.3, then it can work fine for .NET Standard 1.4/1.5/1.6/2.0.

You do have to target both because .NET Framework 4.5.2 does not implement .NET Standard 1.3. Probably you don't want to target .NET Standard 1.2, as it is too limited.