program.cs

来自「csharp课本的源代码」· CS 代码 · 共 28 行

using System;
namespace SealExample
{
    public class Hello
    {
        public sealed void SayHello()
        {
            Console.WriteLine("这是基类!");
        }
    }
    public class NewHello : Hello
    {
        public new void SayHello()
        {
            Console.WriteLine("这是扩充类!");
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            NewHello me = new NewHello();
            me.SayHello();
            Console.ReadLine();
        }
    }
}