Anders Hejlsberg's C# 4.0 REPL

Question

During the last 10 minutes of Ander\'s talk The Future of C# he demonstrates a really cool C# Read-Eval-Print loop which would be a tremendous help in learning the language.

Answer 1

Command-line REPL

To play with the C# REPL outside of Visual Studio, open the Developer Command Prompt for VS2015 and type the command csi to begin your interactive session. Here is a list of arguments that can be passed to csi.

Note: csi stands for "CSharp Interactive"

You can also open an interactive window directly from Visual Studio by navigating to View > Other Windows > C# Interactive.

Check out the Roslyn Wiki on the C# Interactive Window.