[ojnabieoot]

This isn’t necessarily something I’m proud of, but at my old C# job I would do inline C# in Powershell as a very hackish “C# REPL” for prototyping and interactive testing. At the time C# Interactive in Visual Studio was unreliable and I found it easier to just copy-paste C# code into a Powershell script.

It seems that C# Interactive has gotten better (and since leaving that job I have switched to 100% F# for .NET stuff). But a more useful application is using Powershell to bundle a .NET class library into a flexible, low-weight, modular command line application for internal use. For instance, a C# library which does serious analytics on large data, and then a Powershell script that deals with easier annoyances like AWS authentication or FTP access, argument parsing, and so on. Obviously a real .exe is a better long-term solution but I found Powershell worked really well for rapidly sharing compiled .NET code into a tool that data scientists on my team could use.