ClassMethodDemo.CustomerManager.Add_Customer C# (CSharp) Method

        public void Add_Customer(Customer customer)
        {
            Console.WriteLine("--Müşteri Ekleme--");
            Console.WriteLine("Müşteri Id: " + customer.Id);
            Console.WriteLine("Müşteri TcNo: " + customer.TcNo);
            Console.WriteLine("Müşteri Adı: " + customer.FirstName);
            Console.WriteLine("Müşteri Soyadı: " + customer.LastName);
            Console.WriteLine("Müşteri Veri Tabanına Eklendi!");
            Console.WriteLine();
        }

        static void Main(string[] args)
        {
            Customer customer1 = new Customer();

            customer1.Id        = 1;
            customer1.TcNo      = "96385274131";
            customer1.FirstName = "Burak Emre";
            customer1.LastName  = "Aktaş";
            customer1.Age       = 18;

            Customer customer2 = new Customer();

            customer2.Id        = 2;
            customer2.TcNo      = "74185296362";
            customer2.FirstName = "Tuğra Metin";
            customer2.LastName  = "Dönmez";
            customer2.Age       = 18;

            Customer customer3 = new Customer();

            customer3.Id        = 3;
            customer3.TcNo      = "78945612378";
            customer3.FirstName = "Görkem";
            customer3.LastName  = "Öcal";
            customer3.Age       = 19;

            Customer customer4 = new Customer();

            customer4.Id        = 4;
            customer4.TcNo      = "12345678996";
            customer4.FirstName = "Mustafa Berk";
            customer4.LastName  = "Akgül";
            customer4.Age       = 18;

            Customer customer5 = new Customer();

            customer5.Id        = 5;
            customer5.TcNo      = "15975384269";
            customer5.FirstName = "Ahmet Berkay";
            customer5.LastName  = "Yılmaz";
            customer5.Age       = 19;

            Customer[] allCustomers = new Customer[]
            {
                customer1,
                customer2,
                customer3,
                customer4,
                customer5
            };

            CustomerManager customerManager = new CustomerManager();

            customerManager.Get_All_Customer(allCustomers);
            customerManager.Add_Customer(customer1);
        }