'宣言
Public Class _TrendlineDefinition Inherits GrapeCity.DataVisualization.Chart._BaseOverlayDefinition(Of ITrendlineOverlayOption) Implements ILegendOverlayDefinition, IOverlayDefinition, IQueryInterface, ITrendlineDefinition
public class _TrendlineDefinition : GrapeCity.DataVisualization.Chart._BaseOverlayDefinition<ITrendlineOverlayOption>, ILegendOverlayDefinition, IOverlayDefinition, IQueryInterface, ITrendlineDefinition