Microsoft worked on a version of the language called F#.
This compiles an OCaml-like language to CIL for execution on the CLR.
let _ = Printf.printf "Hello World"
F# is only available as a binary release under a Microsoft EULA, and without source code, though the source code for the F# libraries is included. The licence appears to allow commercial use of compiled binaries. However no source is forthcoming at this time under an equitable license.