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

I found http://kamimucode.com/Home.aspx/C-sharp-REPL/1 . Which seems to be pretty good and I believe also exposes an API to evaluate expressions dynamically