public Invoice(string description, EnumCompany company, DateTime issued, DateTime dueDate, double bill)
{
Descriiption = description;
Company = company;
DateIssued = issued;
DueDate = dueDate;
Bill = bill;
}
public Admin(string from, string username, string password, EnumCompany company, string pin) : base(from, string.Empty, username, password, true, pin)
{
Company = company;
}