public static void Main()
AmericanCustomer amerCust = new AmericanCustomer();
Console.WriteLine("AmericanCustomer.CalculateBasePrice: {0}",amerCust.CalculateBasePrice());
Customer cust = new Customer();
Console.WriteLine("Customer.CalculateBasePrice: {0}",cust.CalculateBasePrice());
public virtual decimal CalculateBasePrice()
public class AmericanCustomer : Customer
public override decimal CalculateBasePrice()