ScriptCS.ClrMD
This is a ScriptCS script pack that brings in features of the ClrMD API which can then be used for scripted or interactive diagnostics (via REPL) against any running CLR process.
What is ClrMD?
For an introduction to ClrMD and its API you can check out this blog post on the .NET Framework Blog.
Getting Started with the ClrMD Script Pack
Check out the Interactive Diagnostics with the ScriptCS REPL section of the Wiki for a quick introduction to using ScriptCs.ClrMD in REPL mode.