public String Save(ClassRoom room) { if (room.StartTime > room.Endtime) { return("Time is Unvaluable.. Try Agein..!"); } bool isTimeScheduleValid = IsTimeScheduleValid(room.RoomId, room.DayId, room.StartTime, room.Endtime); if (isTimeScheduleValid != true) { if (classRoomGateway.Insert(room) > 0) { return("Saved Sucessfully!"); } return("Failed to save"); } return("Overlapping not allowed"); }