CLanguage is a .NET Standard library that contains a C/C++ parser, a compiler (to its own VM), and an interpreter (for its VM). It's a very small library that enables you to embed C/C++ scripts into your .NET apps.
It is used to simulate Arduinos in the app iCircuit. It features cycle counting so that infinite loops and long computations can be paused.
I describe other details of it in my blog entry Oops, I Wrote a C++ Compiler.