Names like IsEnabled are following the Framework Design Guidelines (http://www.amazon.com/Framework-Design-Guidelines-Conventions-Libraries/dp/0321545613/ref=sr_1_1?ie=UTF8&s=books&qid=1280076371&sr=8-1) which is a very consistent guide for naming. Sorry, W3bbo, I can't agree with you about "Is" names only be read-only.