You are developing a Windows Forms Application by using the .NET Framework 3.5.You plan to design a composite custom control for the application. You include a ListBox control has a property that provides the item count of  the ListBox control. You need to ensure that the property cannot be accessed at design time. Which attribute should you use？（）

• A、[Bindable（false）]
• B、[DesignOnly（false）]
• C、[EditorBrowsable（EditorBrowsableState.Never）]
• D、[Browsable（false）]