public void UpdateTest()
        {
            //Load up Guids
            PerformerList performers = new PerformerList();
            Performer     performer  = new Performer();

            performers.Load();
            performer = performers.FirstOrDefault(p => p.FirstName == "Hunter");

            GroupList groups = new GroupList();
            Group     group  = new Group();

            groups.Load();
            group = groups.FirstOrDefault(c => c.Name == "Jazz Ensemble");

            InstrumentList instruments = new InstrumentList();
            Instrument     instrument  = new Instrument();

            instruments.Load();
            instrument = instruments.FirstOrDefault(c => c.Description == "Euphonium");

            GroupMember     groupMember  = new GroupMember();
            GroupMemberList groupMembers = new GroupMemberList();

            groupMembers.Load();
            groupMember           = groupMembers.FirstOrDefault(p => p.GroupId == group.Id && p.PerformerId == performer.Id);
            groupMember.StartDate = Convert.ToDateTime("04/24/3000");
            groupMember.EndDate   = Convert.ToDateTime("04/25/3000");

            groupMember.Instrument = instrument.Id;
            int results = groupMember.Update();

            Assert.IsTrue(results == 1);
        }
 // Put: api/GroupMember
 public void Put(Guid id, GroupMember groupMember)
 {
     groupMember.Update();
 }