'宣言
Public Class _CartesianLineLegendSymbolView Inherits _CartesianScatterLegendSymbolView Implements ICartesianLegendSymbolView, ILegendSymbolView
public class _CartesianLineLegendSymbolView : _CartesianScatterLegendSymbolView, ICartesianLegendSymbolView, ILegendSymbolView