Apps written in C# for Mac?

Question

I'm just starting out learning C# on SoloLearn. I know that C# has been made to be a cross-platform programming language. But, I haven't heard of any apps for MacOS that have been written in C#. Does anybody know of any? It would be really great to see what can be done using C# on Mac.

Just an idea, but this might be a great feature to add to the courses. It's really motivating to see what that can be done in certain languages and how the programs written in them may differ based on what kind of language it is. Meaning that what you'd see written in R is going to be very different than C or Python.