'宣言 Public MustInherit Class ColumnBaseBuilder (Of TControl As ColumnBase, TBuilder As ColumnBaseBuilder(Of TControl,TBuilder)) Inherits BaseBuilder(Of TControl,TBuilder)
public abstract class ColumnBaseBuilder<TControl,TBuilder> : BaseBuilder<TControl,TBuilder> where TControl: ColumnBase where TBuilder: ColumnBaseBuilder<TControl,TBuilder>