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