Events in D

[Jonathan Marler via Digitalmars-d]

On Tuesday, 29 August 2017 at 05:10:25 UTC, bitwise wrote:
> I needed some C# style events, so I rolled my own. Long story 
> short, the result was unsatisfactory.
>
> Library based events are inadequate for basically the same 
> reasons as library based properties (often suggested/attempted 
> in C++). The problem is that the properties/events don't have 
> access to the fields or methods of the containing object, and 
> as such, incur the cost of an extra pointer per event/property, 
> or worse, a delegate if custom behavior per event is needed, in 
> order to provide that access.

I'm confused, C# has the same problem with events.  They are 
delegates which under the hood have 2 pointers, a pointer to the 
method and a pointer to an instance of the object.  How would 
that be different than if you used delegates in your D library?