MemberOfferCtors

public Member(List<Offer> assignedOffers, string firstName, string lastName, string email)
{
    _assignedOffers = assignedOffers;
    FirstName = firstName;
    LastName = lastName;
    Email = email;
}

public Offer(Member memberAssigned, OfferType type, DateTime dateExpiring, int value)
{
    MemberAssigned = memberAssigned;
    Type = type;
    DateExpiring = dateExpiring;
    Value = value;
}