Supporting netcoreapp2.0 again

[pieteckhart]

Hi,

At one time this library used multi-targetting to support both .Net standard 2.1 as 2.0 I see that this has been changed so supposedly add support to .Net 5.

I'm no expert on the matter but if I understand correctly there is no reason this codebase can't be compiled against multiple target frameworks.

<TargetFrameworks>netstandard2.0;netstandard2.1;net6.0</TargetFrameworks>

This seems to build just fine. For the project i'm currently working on we are stuck on .Net 4.7 so targetting netstandard2.0 would mean we could use the lastest version.

[MJM1989]

I second this! Would be great to have it available for netstandard2.0