[ModelOf(typeof(ChartCollectionBase))]
public abstract class ChartCollectionBaseModel :
    ChartElementModel,
    ICollection,
    IEnumerable,
    IList

<ModelOf(GetType(ChartCollectionBase))>
Public MustInherit Class ChartCollectionBaseModel
    Inherits ChartElementModel
    Implements ICollection,
               IEnumerable,
               IList