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 [email protected]
  
  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();