'宣言 Public MustInherit Class ExtraSeriesBuilder (Of T,TControl As ExtraSeries(Of T), TBuilder As ExtraSeriesBuilder(Of T,TControl,TBuilder)) Inherits ChartSeriesBaseBuilder(Of T,TControl,TBuilder)
public abstract class ExtraSeriesBuilder<T,TControl,TBuilder> : ChartSeriesBaseBuilder<T,TControl,TBuilder> where TControl: ExtraSeries<T> where TBuilder: ExtraSeriesBuilder<T,TControl,TBuilder>