'宣言 Protected Overrides NotOverridable Sub InsertItem( _ ByVal index As Integer, _ ByVal subItem As SubItem _ )
'宣言
Protected Overrides NotOverridable Sub InsertItem( _ ByVal index As Integer, _ ByVal subItem As SubItem _ )
protected override void InsertItem( int index, SubItem subItem )
SubItemCollection クラス SubItemCollection メンバ