//Overriding a Method

using System;

public class Customer

{

    public virtual void CustomerType()

    {

        Console.WriteLine("I am a customer");

    }

}

public class CorporateCustomer : Customer

{

    public override void CustomerType()

    {

        Console.WriteLine("I am a corporate customer");

    }

}

public class PersonalCustomer : Customer

{

    public override void CustomerType()

    {

        Console.WriteLine("I am a personal customer");

    }

}

public class MainClass

{

    public static void Main()

    {

        Customer[] C = new Customer[3];

        C[0] = new CorporateCustomer();

        C[1] = new PersonalCustomer();

        C[2] = new Customer();

        foreach (Customer CustomerObject in C)

        {

            CustomerObject.CustomerType();

        }

    }

}

//Hiding a Method
using System;
public class Customer

{

    public virtual void CustomerType()

    {

        Console.WriteLine("I am a customer");

    }

}