"We see similar developments with C# borrowing features from F#, with records in v9, pattern matching, etc." Parsing that sentence the subject is C# and F# is

"We see similar developments with C# borrowing features from F#, with records in v9, pattern matching, etc." Parsing that sentence the subject is C# and F# is referenced, but the subject of the sentence didn't change, it remained C# thus logically v9 applies to it.