C#繼承類重寫與隱藏基類方法的區別

using System;
using System.Collections;

public class Nevermore60Customer:Customer
{
public override string GetFunnyString()
{
return "Nevermore60.Nevenmore!";
}

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public class Customer
{
public virtual string GetFunnyString()
{
return "Plain ordinary customer.Kaark!";
}
public class SamplesArray
{
public static void Main()
{
Customer Cust1=new Nevermore60Customer();
Nevermore60Customer Cust2;
// Cust1=new Customer();
Console.WriteLine("Customer referencing Customer."+Cust1.GetFunnyString());
Cust1=new Nevermore60Customer();
Console.WriteLine("Customer referencing Nevenmore60Customer:"+Cust1.GetFunnyString());
Cust2=new Nevermore60Customer();
Console.WriteLine("Nevenmore60Customer referencing"+Cust2.GetFunnyString());

}
}

Customer Cust1=new Nevermore60Customer();
如果是重寫:則,如果聲明的基類對象,指向的是衍生類別,那麼這時調用的是衍生類別中對基本重寫的方法的方法(如上所示)
如果是隱藏基類方法: public New string GetFunnyString()
{
return "Nevermore60.Nevenmore!";
}
則:Customer Cust1=new Nevermore60Customer();此時Cust1調用的仍是聲明時候的基類中的GetFunnyString方法.
但二者聲明與賦值都是同一個類時,不會發生這種問題.