Comments on Derek says:: Generic collections and inheritance

Agree with Sam. A much easier way is to call .Cast...

2008-09-06T03:37:00.000+01:00

Agree with Sam. A much easier way is to call .Cast() and then .ToList()

i.e.
List&ltTDerived&gt derivedList = new...

public static ListTest(List&ltTBase&gt base){...}

ListTest(derivedList.Cast&ltTBase&gt().ToList&ltTBase&gt());

If you're using .Net 3.5 you can use the Enumerabl...

2008-08-05T10:48:00.000+01:00

If you're using .Net 3.5 you can use the Enumerable.Cast and Enumerable.OfType extension methods to do the same thing.

I had no idea you could use yield like that. That'...

2008-08-05T10:00:00.000+01:00

I had no idea you could use yield like that. That's a better solution than mine, thanks for sharing.

I feel your pain ;) I ended up creating a similar ...

2008-08-05T08:40:00.000+01:00

I feel your pain ;) I ended up creating a similar method on my EnumerableHelper class:

public static IEnumerable<TBase> Convert<TDerived, TBase>(IEnumerable<TDerived> enumeration)
where TDerived : TBase
{
foreach (TDerived element in enumeration)
{
yield return element;
}
}