using System;

public class Program

{

    public static void Main()

    {

         //Customer1 have Order 1 for Motorcycle

​

            CustInfo[] customer = new CustInfo[2];

            CustInfo customer1 = new CustInfo { FName = "Joe", Lname = "Smith", orderInfo = new OrderInfo[1] };

            customer[0] = customer1;

            OrderInfo Cust1item1 = new OrderInfo { Order_Qty = 1, Price = 10000, vehicle = new Motorcycle { Radius = 9, Height = 2, Description = "Black", HorsePower = 15 } };

            customer1.orderInfo[0] = Cust1item1;

​

            //Customer2 have order 1 for Automobile

            CustInfo customer2 = new CustInfo { FName = "Joe", Lname = "Cowdry", orderInfo = new OrderInfo[2] };

            customer[1] = customer2;

            OrderInfo Cust2item1 = new OrderInfo { Order_Qty = 1, Price = 45000, vehicle = new Automobile { Length = 5, Width = 3, Height = 2, Description = "Red", HorsePower = 50 } };

            customer2.orderInfo[0] = Cust2item1;

​

            //Customer2 have order 2 Motorcycle

            OrderInfo Cust2item2 = new OrderInfo { Order_Qty = 1, Price = 21000, vehicle = new Motorcycle { Radius = 5, Height = 5, Description = "Metallic", HorsePower = 20 } };

            customer2.orderInfo[1] = Cust2item2;

​

​

​

            using (StreamWriter writer = new StreamWriter("important.txt"))

            for (int i = 0; i < customer.Length; i++)

            {

                if (i > 0)

                {

                    writer.Write("\n-------New Customer-------\n\n\n");

                }

                   writer.Write("Customer Name: {0} {1}\n", customer[i].FName, customer[i].Lname);

                   writer.Write("----------------------------\n");

                for (int j = 0; j < customer[i].orderInfo.Length; j++)

                {

                    writer.Write("Description: {0}", customer[i].orderInfo[j].vehicle.Description);

                    writer.Write("------------");

                    writer.Write("\nPrice\t\tQuantity\tHorse Power\tCargoCapacity\n");

                    writer.Write("{0:C2}\t{1}\t\t{2}\t\t{3}\n\n",

                                       customer[i].orderInfo[j].Price, customer[i].orderInfo[j].Order_Qty, customer[i].orderInfo[j].vehicle.HorsePower, customer[i].orderInfo[j].vehicle.CargoCap());

                }

            }

​

     }

     public class CustInfo

    {

        public string FName { get; set; }

        public string Lname { get; set; }

​

        public OrderInfo[] orderInfo;

    }

    public class OrderInfo

    {

​

        public float Price { get; set; }

        public int Order_Qty { get; set; }

        public Vehicle vehicle { get; set; }

    }

    public class Vehicle

    {

        public string Description { get; set; }

        public int Wheels { get; set; }

        public int HorsePower { get; set; }

        public virtual double CargoCap() { return 0; }//cargo Cap  is override in Automobile and Motorcycle

    }

    public class Automobile : Vehicle

    {

​

        public double Cargo_Capacity, Length, Width, Height;

        public override double CargoCap()

        {

            Cargo_Capacity = Length * Width * Height;

            return Math.Round(Cargo_Capacity, 2);

        }

​

    }

    public class Motorcycle : Vehicle

    {

        public double Cargo_Capacity, Radius, Height;

        public override double CargoCap()

        {

            Cargo_Capacity = (Math.PI * (Radius * Radius) * Height) * 2;

            return Math.Round(Cargo_Capacity, 2);

        }

    }

}

​