generic NOT constraint where T : !IEnumerable

Question

As per the title, is it possible to declare type-negating constraints in c# 4 ?

Answer 1

You use a constraint so you can ensure the type you use has some properties/methods/... you want to use.

A generic with a type-negating constraint doesn't make any sense, as there is no purpose to know the absence of some properties/methods you do not want to use.