I included that for a couple of reasons: 1) It's unusual. Historically, C# is more of a businessy thing, with a bit of game stuff on the side, mainly in the form of scripting. Extremely high performance C# code is even stranger. 2) It's more easily portable than a mixed library. It's definitely not impossible to make/use a cross platform mixed library (they're all over the place), but depending only on one toolchain is just less complicated.

So not a big deal, just a notable quirk.