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

[Tom P.]

What would the difference be between the following two:

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



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

Thanks,
Tom P.

 

[Arne Vajhøj]

What would the difference be between the following two:

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

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

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