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