DualCollection vs Collection

[philchudley]

Simple question, what is the difference between EA.IDualCollection and EA.Collection?

When would you use one over the other?

My Add-In uses EA.IDualCollection at the momment and works fine, but I would like to see a formal definition.

I believe there is also EA.IDualElement and EA.Element, so on a more generic level what is the difference between EA.IDualx and EA.x?

Cheers

[«Midnight»]

Part of the 'bits and bytes' answer lies in the COM origin of EA. Apart from that, just think of these as an interface and a class (which of course they are) and treat each accordingly.

PS: Oh yeah. If you use languages that are not namespace-aware, the interfaces might help avoid name duplication.