'宣言 Public Overridable Function GetTypeOfDay( _ ByVal dateTime As Date, _ ByRef holiday As IHoliday _ ) As DayType
'宣言
Public Overridable Function GetTypeOfDay( _ ByVal dateTime As Date, _ ByRef holiday As IHoliday _ ) As DayType
public virtual DayType GetTypeOfDay( DateTime dateTime, out IHoliday holiday )
HolidayCollection クラス HolidayCollection メンバ