You should probably read the material in this other question , because it really provides links to related materials. But in any case, the bullet point version:
You can invoke unmanaged native code from .NET using P / Invoke . See End of Wikipedia article for tutorials and documentation for this part.
You can export Haskell functions through Haskell FFI . Make sure you export functions using the correct calling convention (stdcall, not ccall). See Also GHC FFI Documentation .
So basically you want to export your Haskell functions, as if you used them with C, create a DLL with the necessary functions, then use P / Invoke to call the Haskell functions. And definitely reread the accepted answer to another question, it mentions a few mistakes that you need to avoid.
CA McCann
source share