public void ReadOnlyCollection_ObserveAddChangedItemsTest()
{
var l = new List <string[]>();
var c = new ObservableCollection <string>();
var r = new ReadOnlyObservableCollection <string>(c);
r.ObserveAddChangedItems()
.Subscribe(x => l.Add(x));
l.Count.Is(0);
c.Add("a");
l.Count.Is(1);
c.Add("b");
l.Count.Is(2);
l[0].Is("a");
l[1].Is("b");
}
