Why doesn't Sun do a C# to Java byte code compiler?

Question

We Want to Run Our C# Code on the JVM

My company has a large C# code base. Well over half of this code is our core engine for creating, reading, modifying, calculating

Answer 1

You can run your .NET code and Java code in the same interpreter! See the IKVM .NET-based JVM, and the Boo and Java wiki page for an example use case (using the .NET-based Boo language to write applications using Java libraries).