I've been doing this a lot.

I am doing an experiment of trying out C# as a Python replacement for automation because of (1) the strength of the built-in libraries and (2) not requiring an interpreter. Bundling the C# runtime into application is doable, and the tools are super portable with no changes so far between Windows/Mac/Linux.

However, the smallest I've been able to get the standalone executables with bundled stripped down runtimes is ~9 MiB.

Even with this limitation, I've been super happy with this experiment so far. I'm not sure how committed I am yet to C# over Python, but it's pretty breathtaking what all you get out of the box with .NET