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