Rule Engine in WF
Check out how to make use of the rule features in Windows Workflow Foundation
http://msdn.microsoft.com/winfx/reference/workflow/default.aspx?
pull=/library/en-us/dnlong/html/intwf_fndrlseng.asp
Personally, I think the Rule Condition Editor does not allow one to easily express complex rules. ![Smile [:)]](/emoticons/emotion-1.gif)