Gets whether the appointment's start and end times are on the same day.
True, if the appointment interval is within a single day; false, if the appointment's start and end times are on different days.
Use the SameDay property to determine whether an appointment that isn't an all day appointment (whose AppointmentItem.AllDay property is set to false) starts and ends on the same day.
For all-day appointments, this property returns false. For an appointment that occupies less than a day and ends at midnight, this property returns true.