'宣言
Public Class _WaterfallPlotDefinition Inherits _BarCartesianPlotDefinition Implements ICartesianPlotDefinition, IPlotDefinition, IQueryInterface, IWaterfallPlotDefinition
public class _WaterfallPlotDefinition : _BarCartesianPlotDefinition, ICartesianPlotDefinition, IPlotDefinition, IQueryInterface, IWaterfallPlotDefinition