1     public sealed class myClass     //声明密封类
2     {
3         public int = 0;
4         public void method()
5         {
6             Console.WriteLine("密封类");
7         }
8     }

using System;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            MyClass2 test = new MyClass2();
            test.Method();
        }
    }

    public class MyClass1
    {
        public virtual void Method()
        {
            Console.WriteLine("基类中的虚方法");
            Console.ReadLine();
        }
    }

    public sealed class MyClass2:MyClass1
    {
        public sealed override void Method()
        {
            base.Method();
            Console.WriteLine("密封类中重写后的方法");
        }
    }
}