I don't, I've written a prototype for my lib a year ago in C# and probably have that lying around somewhere but since then we've ported it to C++ and done heavy refactoring/development - I could probably spend some time and try to get that prototype working on JSIL but I need to see how the xamarin story plays out before I invest significant time into this.

IIRC LLILC is ways off from actually being usable as a static compiler and you'll still have to figure out how to ship a runtime and do GC in asm.js (realistically can't) and not to mention it's single threaded so it's a question if you can even get CoreCLR to run in such enviroment without heavy modifications.

It would be huge if we could just write everything in C# (frontend/lib and backend) but I don't see this realistically being possible for at least two years given the development pace of webasm.