Help with the difference between "Implements" and "Inherits"

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Tom P. - 24 Jul 2008 19:50 GMT

What would the difference be between the following two:

public class Foo : IList<string>
{
...
}

public class Foo : List<string>
{
...
}

Thanks,
Tom P.

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Adam Clauss - 24 Jul 2008 19:53 GMT

In the first one, Foo would have to manually implement all the members
defined by IList<string>.

In the second one, Foo would already come complete with all the
implementation that exists in List<string>, and you could just add
additional functionality on top of it.

Signature

Adam Clauss

> What would the difference be between the following two:
>
[quoted text clipped - 10 lines]
> Thanks,
> Tom P.

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Arne Vajhøj - 24 Jul 2008 21:53 GMT

> What would the difference be between the following two:
>
[quoted text clipped - 7 lines]
> ...
> }

The first only inherit the interface. The second inherit
only the interface and the implementation.

But I would be careful with the second - it is easy to
become coupled with the internals of List.

Arne

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