[invalidname]

C# was designed in a way that makes it very hard to run on the JVM in a performant way. It has slightly different scope behaviors, slightly different asthmatics etc. Source: worked on a JVM running on C# which was hard, I think the reverse is even harder.

[native_samples]

It might be easier these days with GraalVM/Truffle. You wouldn't run C# directly, you'd implement CIL in a Truffle interpreter, so you bypass JVM bytecode and its semantics entirely.