public Collaborateur(int codecoll, string nom, string prenom, DateTime dembauche, decimal prjournalier, Qualification qualif)
 {
     CodeColl = codecoll;
     Nom = nom;
     PreNom = prenom;
     DEmbauche = dembauche;
     PrJournalier = prjournalier;
     LaQualif = qualif;
 }
 public ProjetRegie(int codeprojet, string nomprojet, DateTime ddbut, DateTime df, Client leclient, string contact, string mail, Collaborateur collab,decimal tarif, Qualification qualific) : base(codeprojet, nomprojet, ddbut, df, leclient, contact, mail, collab)
 {
     TarifJournalier = tarif;
     Qualification = qualific;
 }
 public Prevision(Qualification laqualif, short nbjours)
 {
     LaQualif = laqualif;
     NbJours = nbjours;
 }