'宣言 Protected Overrides NotOverridable Sub SetItem( _ ByVal index As Integer, _ ByVal item As Date _ )
'宣言
Protected Overrides NotOverridable Sub SetItem( _ ByVal index As Integer, _ ByVal item As Date _ )
protected override void SetItem( int index, DateTime item )
SelectedDatesCollection クラス SelectedDatesCollection メンバ