The lack of an available runtime implementation, or the transitive dependencies of the dynamically linked reference assemblies, does not preclude the compiled a

The lack of an available runtime implementation, or the transitive dependencies of the dynamically linked reference assemblies, does not preclude the compiled assembly from being cross-platform. The assembly within the file built by a C# compiler contains IL code that can be extracted by cross-platform tooling. There’s nothing OS-specific at that layer. We are talking about the language, not the runtime implementation.