public ProjetForfait(int codeprojet, string nomprojet, DateTime ddbut, DateTime df, Client leclient, string contact, string mail, decimal mt, Penalite p, Collaborateur cl, List <Prevision> prev) : base(codeprojet, nomprojet, ddbut, df, leclient, contact, mail, cl)
 {
     MontantContrat = mt;
     PenaliteOuiNon = p;
     ChefDeProjet = cl;
     previsions = prev;
 }
 public Projet(int codeprojet, string nomprojet, DateTime ddbut, DateTime df, Client leclient, string contact, string mail, Collaborateur collab)
 {
     CodeProjet = codeprojet;
     NomProjet = nomprojet;
     DDebut = ddbut;
     DFin = df;
     LeClient = leclient;
     Contact = contact;
     MailContact = mail;
     LeCollaborateur = collab;
 }
 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;
 }