#! like support for file-based apps on windows?

[cvertee]

This is probably not the first time someone asks this but whatever. The #! hack on linux is great we can all agree on that, it's pretty simple and fun to use, maybe even soooo useful to put somewhere in the PATH directory.

But what about windows? Can I somehow build one single file based app in one .exe file? Only guess for now is to use workarounds like .cmd files in big 2025 if i want to just type myapp.cmd myargument1 myargument2 which runs dotnet run myapp.cs <...> in the middle. But maybe im wrong?

[jjonescz]

In PowerShell I guess you can do something like this :)

Get-Content -Path $PSCommandPath | Select-Object -Skip 1 | dotnet run -; exit $LASTEXITCODE
// any C# code can go here
Console.WriteLine("Hello from a PowerShell file-based app!");

I imagine one could come up with something like that for a .cmd file too.

[KostasVsNT]

This is the double-clickable batch file version of the above (with added argument passthrough):

@echo off
powershell.exe -NoProfile -ExecutionPolicy Bypass -Command "Get-Content -Path '%~f0' | Select-Object -Skip 5 | dotnet run - -- %*; exit $LASTEXITCODE"
exit /b %errorlevel%

REM CSHARP SCRIPT STARTS HERE

Console.WriteLine("Hello from a double-clicked .bat!");
Console.WriteLine($"Number of args: {args.Length}");

The Spiderman mantra applies 🙂.

The issue is that this is always re-compiled, and that the runfile cache just grows forever.