ObservableList lacks RemoveRange(IEnumerable<T>), can be implemented?

[sn4k3]

I know normal List also lacks this overload, but it's very convenient to have when dealing with UI, for example to remove a bunch of selected items from a grid without must foreach and call single Remove(item) which is also less performant.
HashSet does have it, it's a shame List don't.

You think this can go in the library?
Also, would be nice to have the ***Range(IEnumerable items) overloads, since many collections from UI are returned that way. So, it can redirect to ***Range(items.Cast<T>())