I am new in nhibernate .I want to get specific columns in my query(Because of performance .vs..)

I make it with this code

DetachedCriteria criteria = DetachedCriteria.For<Musteri>();
ProjectionList props = Projections.ProjectionList();
props.Add(Projections.Property("MusteriId"), "MusteriId");
props.Add(Projections.Property("Adresi"), "Adresi");
props.Add(Projections.Property("MusteriAdi"), "MusteriAdi");

criteria.SetProjection(Projections.Distinct(props));
criteria.SetResultTransformer(new AliasToBeanResultTransformer(typeof(Musteri)));

NHibernate.ICriteria c = criteria.GetExecutableCriteria(nhSession);
Musteri Sonuc = ((Musteri)c.UniqueResult());

nhSession.Evict(null);
nhSession.Clear();
Sonuc.Adresi = "12";
nhSession.Update(Sonuc);
nhSession.Flush();


My Problem is if I run that code it try to update all columns (not only I added before props.Add(Projections.Property )

How I can resolve this only update specific columns of entity which I load before with props.Add(Projections.Property("MusteriAdi"), "MusteriAdi");

Note ı try update_statement=true in hbm.xml but not solved