You don't need to learn either C# or Windows programming in general to use F# effectively. .NET is a different story, as it provides a lot of core functionalit

You don't need to learn either C# or Windows programming in general to use F# effectively. .NET is a different story, as it provides a lot of core functionality. F# was the first cross-platform language from .NET, so it has better supported on OSX and Linux platforms.