If your code does not rely on native libraries, or you're fine with shipping multiple copies for different operating systems, a single build works everywhere with dotnet installed.

Or you can cross-compile and run without having dotnet on the target system, I do it from Linux to all three platforms all the time, it's pretty seamless. The application can be packaged into a single binary (similar to Go), or as a bunch of files which you can then then package up into a zip file.