'宣言
Public Class _OverlayItemizedLegendDataModel Inherits _ItemizedLegendDataModel Implements IItemizedLegendDataModel, ILegendDataModel, IQueryInterface, ISingleLegendDataModel
public class _OverlayItemizedLegendDataModel : _ItemizedLegendDataModel, IItemizedLegendDataModel, ILegendDataModel, IQueryInterface, ISingleLegendDataModel