public bool RentClassRooms(List <RequestMatch> requests) { bool didWork = true; foreach (RequestMatch rm in requests) { TimeSpan ts = new TimeSpan(7, 0, 0, 0); bool t = dbCtrl.RentClassRoom(rm.ClassroomId, rm.GroupId, DateTime.Now, DateTime.Now.Add(ts)); if (!t) { didWork = false; } } return(didWork); }