[utf_8x]

If you want a more... ergonomic language, you can also use the new "run file directly" functionality in .NET 10. It supports shebangs directly and it will even install packages referenced in the script!

  #!/usr/bin/env dotnet run
  #:package Newtonsoft.Json@13.0.3
  
  using Newtonsoft.Json;
  
  Console.WriteLine(
    JsonConvert.SerializeObject(new { Hello = "world" })
  );

Even better, with the #:sdk directive, you can even serve a tiny web app directly from your "fancy shell script"...

  #!/usr/bin/env dotnet run
  #:sdk Microsoft.NET.Sdk.Web
  
  WebApplication
    .Create()
    .MapGet("/", () => "Hello from a shell script!")
    .Run();

[zmj]

I wrote my first one of these today (making a tool for agents in a c# codebase). Pretty good experience, though AOT does still have some rough edges.