'宣言
Public Class _RangeValuePointDataModel Inherits _ValuePointDataModel Implements ICartesianPointDataModel, IDataModel, GrapeCity.DataVisualization.Chart.IGrouping(Of DataValueType), IPointDataModel, IQueryInterface, IRangeValuePointDataModel
public class _RangeValuePointDataModel : _ValuePointDataModel, ICartesianPointDataModel, IDataModel, GrapeCity.DataVisualization.Chart.IGrouping<DataValueType>, IPointDataModel, IQueryInterface, IRangeValuePointDataModel