c# return named tuple from linq join

Question

i'am trying to perform a join between a revision entity from nhibernate envers and a list with user names. i want to return a list of named tuples.

this is my code

public IEnumerable<(Societa company, DateTime datetime, string userName)> CompanyHistory()
{
    IAuditReader auditReader = this._session.Auditer();
    var revison = auditReader.CreateQuery().ForHistoryOf<Societa, RevisionEntity>().Results();
    IList<Persona> user = _session.QueryOver<Persona>().List();

    var query = revison.Join(user,
                        rev => rev.RevisionEntity.IdUtente,
                        us => us.Id,
                        (rev, us) => new
                        {
                            Oggetto = rev.RevisionEntity,
                            DataModifica = rev.RevisionEntity.RevisionDate.ToLocalTime(),
                            NomeUtente = us.NomePersona
                        }).ToList();
}

but now i didn't find a way to return the tuple

• cast didn't work
• ToValueTuple is not avaible to fro my query object

i try also

(ele, p) => new (OutputGA Oggetto, DateTime DataModifica, string NomeUtente)
            {
                Oggetto = ele.RevisionEntity,
                DataModifica = ele.RevisionEntity.RevisionDate.ToLocalTime(),
                NomeUtente = p.NomePersona
            }).ToList();

but i got new cannot be used with tuple type

than

(ele, p) => new Tuple<OutputGA, DateTime, string>
            {
                Oggetto = ele.RevisionEntity,
                DataModifica = ele.RevisionEntity.RevisionDate.ToLocalTime(),
                NomeUtente = p.NomePersona
            }).ToList();

and got error about parameter not corresponding

Answer 1

You can try this

var tuples = data.Select(x => (A: x.A, B: x.B));