AppWithPlugin for Mono without Dotnet 3.x
It works for Mono 5.20+
Note: Do not use DotNet 3.1+
Please use only Mono for Mac/Linux:
For Windows Users should for Net Frameworks 4.5
If you use DotNet 3.1 or Net 5 than you should use https://github.com/dotnet/samples/tree/master/core/extensions/AppWithPlugin