'宣言
Public MustInherit Class _BaseOverlayView (Of TOwnerView As IPlotView, TDefinition As IOverlayDefinition) Inherits _BaseView(Of TOwnerView) Implements IIdentityView, IModel, IOverlayModel, IOverlayView, IQueryInterface, IView, IViewModel
public abstract class _BaseOverlayView<TOwnerView,TDefinition> : _BaseView<TOwnerView>, IIdentityView, IModel, IOverlayModel, IOverlayView, IQueryInterface, IView, IViewModel where TOwnerView: IPlotView where TDefinition: IOverlayDefinition