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Questioninterface inherits from interface, method over-ridden: my brain is stuck Pin
BillWoodruff3-May-16 7:24
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AnswerRe: interface inherits from interface, method over-ridden: my brain is stuck Pin
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GeneralRe: interface inherits from interface, method over-ridden: my brain is stuck Pin
BillWoodruff4-May-16 2:55
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GeneralRe: interface inherits from interface, method over-ridden: my brain is stuck Pin
Sascha Lefèvre4-May-16 4:45
professionalSascha Lefèvre4-May-16 4:45 
BillWoodruff wrote:
I suppose there's an outside chance that what I may be observing here has something to do with the "nature" of the 'Action and 'Func delegates
No, it's unrelated.

BillWoodruff wrote:
But, then, what is the use of over-riding hiding in an Interface for ? Why allow it ?
Basically to allow exactly what you want:
Consider implementing interface members explicitly to simulate variance (that is, change parameters or return type in overridden members).

This is often done to offer strongly-typed versions of the interface members.
The VMouseDown-member from IViewModel is only hidden in IControl, not overridden or re-defined. The wording in the above quote is actually misleading in this regard.

The reason the hidden member from IViewModel has still to be implemented by a class implementing IControl (I understand that this is the point of your 'confusion') is polymorphism: IControl is IViewModel because it inherits from it, so it's required to be possible to pass an object of a class that implements IControl to a method that takes an IViewModel-parameter (which could make use of the VMouseDown-member as declared in IViewModel).
If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson


modified 4-May-16 11:16am.

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