The big impediment imho between c# and scripting language is the whole Visual Studio project experience. With Roslyn they introduced the csx format for c# scripts so you can have a stand-alone 1-file executable c# script, but the tooling hasn't caught up yet.

I'm using LinqPad for all kinds of one-off scripting jobs and loving it. I was trying to learn PowerShell for that task but I've finally given up on that. PowerShell has some great features, but the overall chaotic syntax just kills me.