Sure. But when you are looking cross platform there are much better languages than C#.

IMO, not with anything approaching the install base/jobs/tooling/etc. of C#, and you get the ability to practically use F# when appropriate.

Also, how many big "enterprise" shops are doing interop between a C-Style language and an ML-style language? Probably not many, and almost certainly more are doing it with C#/F# than anything else.