C＃WPF委托返回对象

Question

I have mainwindow, where is stored List<> of some objects. Then user can open another window and I need to have access to List<> from parent window in this new window, not just in constructor, but from any method etc...

So I created public delegate with return type List<> in child window. And hooking delegate method in parent window like this:

+=delegate{ return.List<>;}

Whenever I call this delegate in child window I get my List<> .

My question is, if List<> is copied or if its reference to original one? I need it to be reference, so I dont waste memory.

Thanks for answer!

Answer 1

It will be returned as a reference to the original List<>. A List will need a very explicit Clone() to do otherwise.

Aside: Your public delegate should be an event .

And with an interface or common base class, you could just have used a List<> property .