ScriptCS: C# script, coming to VisualStudio

scriptcs - Write C# scripts in your favorite text editor
Based on Roslyn C# compiler (as a service) written in C#,.
open source ScriptCS will apparently be included to VisualStudio,
along with Script VB and Script FS (F#), and node.js that is already there.

podcast: The Future of ScriptCS with Glenn Block @ NET Rocks!

Introduction to scriptcs – Pluralsight Training

C# compiler API was always available as a part of .NET, 

but calling it required Reflection and was not simple. 

This could be useful for making plugins and "embedded" DSLs.