How can i cast into a ObservableCollection<object>

Question

How can i cast

from ObservableCollection<TabItem> into ObservableCollection<object>

this doesnt work for me

(ObservableCollection<object>)myTabItemObservableCollection

Answer 1

you should copy like this

return new ObservableCollection<object>(myTabItemObservableCollection);

Answer 2

Basically, you can't. Not now, and not in .NET 4.0.

What is the context here? What do you need? LINQ has Cast<T> which can get you the data as a sequence, or there are some tricks with generic methods (i.e. Foo<T>(ObservalbleCollection<T> col) etc).

Or you can just use the non-generic IList?

IList untyped = myTypedCollection;
untyped.Add(someRandomObject); // hope it works...