NoBodyToBuild.SampleE.AppointChairmanService.AppointChairman C# (CSharp) Method

        public void AppointChairman(TeamId teamId, TeamMemberId teamMemberId)
        {
            var team = _teamRepository.Get(teamId);
              var teamMember = _teamMemberRepository.Get(teamMemberId);

              teamMember.MustBePartOfTheTeam(team.Id);
              teamMember.MustBeAMemberForAtLeastTwoYears();

              team.SetNewChairman(teamMember.Id);
        }