'宣言
Public Interface IRangeValuePointDataModel Inherits ICartesianPointDataModel, IDataModel, GrapeCity.DataVisualization.Chart.IGrouping(Of DataValueType), IPointDataModel, IQueryInterface
public interface IRangeValuePointDataModel : ICartesianPointDataModel, IDataModel, GrapeCity.DataVisualization.Chart.IGrouping<DataValueType>, IPointDataModel, IQueryInterface