'宣言 Public MustInherit Class BarcodeBaseBuilder (Of TControl As BarcodeBase, TBuilder As BarcodeBaseBuilder(Of TControl,TBuilder)) Inherits ControlBuilder(Of TControl,TBuilder)
public abstract class BarcodeBaseBuilder<TControl,TBuilder> : ControlBuilder<TControl,TBuilder> where TControl: BarcodeBase where TBuilder: BarcodeBaseBuilder<TControl,TBuilder>