Save fk right after pk is generated with Entity

Question

I have a system and this system has some tables that are associative. As soon as I write the main table in the comic book, I need to make sure that that new generated PK is recorded in three other tables, but you have to make sure it’s the one generated. The system runs on the web and it needs to be avoided that someone else is using the same routine and fire another PK, entede?

Here Gero the PK that will be FK in the other tables

[HttpPost]
public void GravaResponsavel(string _responsavel, bool _ativo)
        { 
            using(RupturaEntities db = new RupturaEntities())
            {
                Responsavel resp = new Responsavel();
                try
                {
                    resp.NM_Responsavel = _responsavel;
                    resp.Ativo = _ativo;
                    db.Responsavel.Add(resp);
                    db.SaveChanges();
                }
                catch(Exception ex)
                {}
            }
        }

Answer 1

At the end of recording, go get the id table Responsavel won’t solve your problem?

[HttpPost]
public void GravaResponsavel(string _responsavel, bool _ativo)
{ 
    using(RupturaEntities db = new RupturaEntities())
    {
        Responsavel resp = new Responsavel();
        Tabela1 tbl1 = new Tabela1();
        Tabela2 tbl2 = new Tabela2();
        Tabela3 tbl3 = new Tabela3();
        try
        {
            resp.NM_Responsavel = _responsavel;
            resp.Ativo = _ativo;
            db.Responsavel.Add(resp);
            db.SaveChanges();

            tbl1.id_Responsavel = resp.id;
            tbl2.id_Responsavel = resp.id;
            tbl3.id_Responsavel = resp.id;

            db.Tabela1.add(tbl1);
            db.Tabela2.add(tbl2);
            db.Tabela3.add(tbl3);

            db.SaveChanges();
        }
        catch(Exception ex)
        {}
    }
}