public static List<Customer> createCustomers()
        {
            List<Customer> list = new List<Customer>();
            
            Customer customer = new Customer();
            customer.firstName = "George";
            customer.lastName = "Clooney";
            customer.gender = Gender.male;
            customer.product = Product.WordPerfect.ToString();
            customer.dateOfPurchase = new DateTime(2014, 10, 31);
            customer.address = new Address("P.O. Box 222", "Santa Fe", "NM", 87501);
            customer.getGeneratedProperties();
            list.Add(customer);

            customer = new Customer();
            customer.firstName = "Carly";
            customer.lastName = "Fiorina";
            customer.gender = Gender.female;
            customer.product = Product.Word.ToString();
            customer.dateOfPurchase = new DateTime(2015, 12, 25);
            customer.address = new Address("35 Hewlett-Packard Rd", "Mendocino", "CA", 21345);
            customer.getGeneratedProperties();
            list.Add(customer);

            customer = new Customer();
            customer.firstName = "Jeff";
            customer.lastName = "Bezos";
            customer.gender = Gender.male;
            customer.product = Product.WordPerfect.ToString();
            customer.dateOfPurchase = DateTime.Now.AddDays(-2); // set up customer as buying product 2 days ago
            customer.address = new Address("1200 World Domination Blvd", "Seattle", "WA", 91834);
            customer.getGeneratedProperties();
            list.Add(customer);
            return list;
        }
        public static List<Customer> createCustomers()
        {
            List<Customer> list = new List<Customer>();
            
            Customer customer = new Customer();
            customer.firstName = "George";
            customer.lastName = "Clooney";
            customer.gender = Gender.male;
            customer.product = Product.WordPerfect;
            customer.dateOfPurchase = new DateTime(2014, 10, 31);
            customer.address = new Address("P.O. Box 222", "Santa Fe", "NM", 87501);
            list.Add(customer);

            customer = new Customer();
            customer.firstName = "Carly";
            customer.lastName = "Fiorina";
            customer.gender = Gender.female;
            customer.product = Product.Word;
            customer.dateOfPurchase = new DateTime(2015, 12, 25);
            customer.address = new Address("35 Hewlett-Packard Rd", "Mendocino", "CA", 21345);
            list.Add(customer);

            return list;
        }