public static bool AddCandidate(string candidateName, string seatName, string teamName)
        {
            List <Seats>      lSeat = DatabaseHandler.GetAllSeats();
            List <Teams>      lTeam = DatabaseHandler.GetAllTeams();
            List <Candidates> lCan  = DatabaseHandler.GetAllCandidates();
            int seatId = 0;
            int teamId = 0;

            foreach (Seats seat in lSeat)
            {
                if (seat.SeatName == seatName)
                {
                    seatId = seat.SeatId;
                    break;
                }
            }
            foreach (Teams team in lTeam)
            {
                if (team.TeamName == teamName)
                {
                    teamId = team.TeamId;
                    break;
                }
            }
            foreach (Candidates can in lCan)
            {
                if (can.SeatId == seatId && can.TeamId == teamId)
                {
                    return(false);
                }
            }
            DatabaseHandler.AddCandidate(candidateName, seatId, teamId);
            return(true);
        }