When working with single files, I recommend using the modern approach of C# Script:

dotnet tool install -g csharprepl
echo Console.WriteLine(args[0]); > file.csx
echo Console.WriteLine("Press CTRL + D to exit."); >> file.csx
csharprepl file.csx -- "Hello world!"

Limitations

• It is not possible to create executable files.

• Not possible to use NuGet packages and declare namespaces.

• Debugging complex code is difficult and should be avoided.