Target .NET Standard 2.0 to Support .NET Core Build

[ab-tools]

Do you consider to change the target framework to .NET Standard 2.0 to also support .NET Core using this library?

[oozcitak]

This is not possible since there is no winforms (System.Windows.Forms) in .NET Standard.

[ab-tools]

Sorry, you indeed can't target .NET Standard with a WinForms project, but you need to target .NET Core directly instead:
WinForms is supported in .NET Core in .NET Core 3.x.

It would therefore be great if you could (additionally to .NET Framework) also target .NET Core with your library. Thanks!

[oozcitak]

Would you be interested in sending a PR?

[ab-tools]

Done here:
#223

It was in fact much simpler than I thought as the code compiled without any problems under .NET 3.1 without any code changes needed:
So I just added two .NET Core 3.1 projects to the solution now - that's it. :-)

[oozcitak]

Thank you. I'll look into this today. Just a quick comment though. I thought it was possible to target multiple frameworks in a single .csproj. Is this not the case? Anyway, I'll review and get back to you.

[ab-tools]

Did you have the chance to take a look on this, @oozcitak?

Actually it might be best to provide a Core version of ImageListView as a separate NuGet package or what do you think?