public void Basic()
 {
     var prop = new ReactiveProperty<int>(3);
     IReadOnlyObservableList<int> coll = prop.ToLiveLinq<int>().ToReadOnlyObservableList();
     coll.Count.Should().Be(1);
     coll[0].Should().Be(3);
     prop.Value = 4;
     coll[0].Should().Be(4);
 }