I think it is quite a disappointment that JetBrains has not even EAP'ed ReSharper 4.0. C# 3.0 has been in the works for a couple of years now, plenty of time to start a project in the background. JetBrains used to be first to the market in innovations. Now ReSharper is becoming less and less useful to me as I am using more C# language features. Perhaps the company has taken on too much in recent years.