Looking for simple rules-engine library in .NET [closed]

Answer 1

Have a look at Logician: tutorial/overview on CodeProject

Project: page/source on SourceForge

Answer 2

The official MS solution for this is Windows Workflow. Although I wouldn't call it "simple", it meets all of your specifications (which would require an extensive framework to meet, anyhow).

Answer 3

Try out http://rulesengine.codeplex.com/

It's a C# Open-Source rules engine that works with Expression trees.