not sure if this is what you meant, but you can run linq files from the command line!
But for Devops, build pipelines, etc. I prefer something a little more universally applicable and legible and that doesn't require a runtime. So bash is usually my approach there. Sometimes PowerShell if I know I'm going to be running it on a Windows box anyway.
Much as I love C#, if I came into an environment and all the Devops/CI/CD was done using Linqpad and lprun I'd immediately wonder what in the actual fuck I had gotten myself into, lol.