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）]