public ChangeAgreementEvent CreateChangeAgreementEvent(int agrId, Dictionary <string, int> changes, int valeur)
{
if (!Agreements.Any(x => x.Id.Equals(agrId)))
{
return(null);
}
var ce = new ChangeAgreementEvent(agrId, changes, valeur);
AgreementEvents.Add(ce);
return(ce);
}
