关于C#中,继承类重写与隐藏基类方法的区别!

using System;
using System.Collections;

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

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();
如果是重写:则,如果声明的基类对象,指向的是派生类,那么这时调用的是派生类中对基本重写的方法的方法(如上所示)
如果是隐藏基类方法: public New string GetFunnyString()
 {
  return "Nevermore60.Nevenmore!";
 }
则:Customer Cust1=new Nevermore60Customer();此时Cust1调用的仍是声明时候的基类中的GetFunnyString方法.
但二者声明与赋值都是同一个类时,不会发生这种问题.

本文地址：http://com.8s8s.com/it/it42526.htm