Mark Nicholls <[EMAIL PROTECTED]> wrote:
> Sorry to bombard with generic questions...
>
> I've just come across
>
> interface IA<X>
> {
> ...
> }
>
> interface IB<X> : IA<X?> // yes the '?' is not a typo
> {
> }
>
> it does compile...it gives
>
> The type 'A' must be a non-nullable value type in order to use it as
> parameter 'T' in the generic type or method 'System.Nullable<T>'
>
> i.e. it understands what the T is....but I don't.
Is there a question in there?
'T?' is short for 'System.Nullable<T>', but it is constrained to value
types.
-- Barry
--
http://barrkel.blogspot.com/
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