Trouble to compile netcore3 branh

[Psydis]

I'm in trouble to compile netrcore3 brach ... i tried with Framework 4.6.1 - Net Standard 2.0 because can't compile it in 4.7.2/4.8 or standard 2.1 but there is an error in IFirmataProtocol to use C#8.

It can't use "default interface" in c# 7.3 to implement:
SendSysExWithReply(SysEx message, Func<SysEx, bool> replyCheck, int? timeoutMs)

Have you got any idea about that?

[jeroenwalter]

In visual studio, unload the following projects, as I've forgotten to delete them:
Solid.Arduino
Solid.Arduino.IntegrationTest
Solid.Arduino.Monitor
Solid.Arduino.Run
Solid.Arduino.Test

They use framework4.8 and are not for .netcore. I don't care for these projects, should've deleted them long ago, as .netcore is the way to go.
They are replace by the Solid.Arduino.Core.* projects, but I still need to port the Test project someday.