I’ve prepared a compact .NET CIL interpreter called Fint in pure F# for NskDotNet Meetup #6.

It can run C# programs with the following features at this point:

• all control flow statements (if, for, switch, etc)
• arithmetic operations including bitwise one
• boolean algebra operators
• string concatenation
• static function calls
• Console.WriteLine calls

It can be easily extended with other features.

Some code in this project is just ported from PageFX project I wrote about recently.

It would be nice to try porting Fint to JavaScript using Fable and run .NET binary code right in a browser. Later we can try to port Roslyn C# compiler to WASM with Blazor compiler and build online tutorial that:

• compiles small C# program to .NET PE file in browser
• runs .NET PE file in browser
• shows CIL code for given method
• provides debugging experience of CIL instruction set

This could be a great web resource to help learning .NET code at low-level.

If you like Fint project please stargaze it on github.

Here is a recording of my presentation. Sorry for speaking so boring 😄

Enjoy!