If GenerateAdjacentNextMonthDays is set to true, the DaySlot objects generated in the C1.WPF.Schedule.C1CalendarItem.DaySlots collection for next month days will not be empty (Empty is false and Date contains a date from the next month).
If GenerateAdjacentNextMonthDays is set to false, the DaySlot objects generated in the C1.WPF.Schedule.C1CalendarItem.DaySlots collection for previous month days will be empty (Empty is false).