Beginner Implement IList problem

[Paul]

Hi all,

I'm trying to implement IList and keep getting an error when trying to
implement GetEnumerator() .
My class has a List<String> and I've been using its methods as return
types for IList, but I can't seem to figure the the get enumerator
section. I try:

//IEnumerable
public IEnumerator GetEnumerator()
{

return list.GetEnumera tor();
}

but keep getting the error:

Error 1 'Foo' does not implement interface member
'System.Collect ions.Generic.IE numerable<strin g>.GetEnumerato r()'.
Foo.GetEnumerat or()' is either static, not public, or has the wrong
return type.

Any help would be appreciated.

Thanks,

Paul

[Jon Skeet [C# MVP]]

Re: Beginner Implement IList problem

Paul <Gef.Mongoose@g mail.com> wrote:[color=blue]
> I'm trying to implement IList and keep getting an error when trying to
> implement GetEnumerator() .
> My class has a List<String> and I've been using its methods as return
> types for IList, but I can't seem to figure the the get enumerator
> section. I try:
>
> //IEnumerable
> public IEnumerator GetEnumerator()
> {
>
> return list.GetEnumera tor();
> }
>
> but keep getting the error:
>
> Error 1 'Foo' does not implement interface member
> 'System.Collect ions.Generic.IE numerable<strin g>.GetEnumerato r()'.
> Foo.GetEnumerat or()' is either static, not public, or has the wrong
> return type.[/color]

Are you sure you're trying to implement IList rather than
IList<string>? The error message suggests that you're trying the latter
(which itself derives from IEnumerable<T>) whereas your method
declaration is really implementing IEnumerable (which you need if
you're implementing the non-generic IList). In fact, you'll need the
non-generic version anyway, because IEnumerable<T> extends IEnumerable.
You'll need to implement one of them explicitly, eg:

public IEnumerator<str ing> GetEnumerator()
{
return list.GetEnumera tor();
}

public IEnumerator IEnumerable.Get Enumerator()
{
return GetEnumerator() ;
}

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