public ActivityPlanningBusiness(string name, DateTime plannedDate, List <int> attendees, int homeId) { activityModel = new ActivityModel(); activityModel.Name = name; activityModel.PlannedDate = plannedDate; activityModel.Attendees = attendees; activityModel.AttendeesString = activityModel.GetAttendeesListAsString(); activityModel.HomeId = homeId; }