C# REPL outside Visual Studio

Question

F# has a REPL (read–eval–print loop) F# Interactive, C:\\Program Files (x86)\\Microsoft F#\\v4.0\\Fsi.exe.

I understand C# now has its own interactive REPL,

Answer 1

It may not be a substitute but I mainly use RoslynPad for quick research and test. I've also used Linqpad. RoslynPad is "A simple C# editor based on Roslyn" according to their website https://roslynpad.net/. You can write small scripts and you can see variables values' and you may also save them.