Question on Interface

[humble_learner]

Hi,

Can you please help interpret the following statement with respect to C# ?

[Code]
All objects must expose some dynamic interface discovery mechanism so consumer components can, if they desire, access their "extended" interfaces.
[\Code]

I am not very clear with regard to what the author is trying to say with regard to dynamic interface discovery mechanism here - can someone please explain ?

[rliq]

I believe it means that an object (A) must supply a mechanism that allows other objects (B,C,D... etc) to detemine what the object (A) provides.

In other words, other objects (B,C,D... etc) must be able to enumerate the methods/properties etc in the original object (A).

[boudino]

It seems like it talks about COM which has other approach to interfaces than C#.

[darwen]

All objects must expose some dynamic interface discovery mechanism so consumer components can, if they desire, access their "extended" interfaces.

If this really is .NET, then you get all this for free as part of the language.

You've got the 'is' keyword (or 'as' and test for null) which tests if an object implements a particular interface (amongst other things).

You can also use reflection to determine if a type implements a particular method.

Darwen.