C#关键字overwrite

namespace 重寫
{
    class Parent
    {
        public void F()
        {
            Console.WriteLine("Parent.F()");
        }
        //重写的属性必须是virtual、abstract或override
        public virtual void G() //虚方法
        {
            Console.WriteLine("Parent.G()");
        }
    }
    class ChildOne : Parent //子类一继承父类
    {
        new public void F() //覆写(overwrite)父类函数
        {
            Console.WriteLine("ChildOne.F()");
        }
        public override void G() //重写(override)父类虚函数,主要实现多态
        {
            Console.WriteLine("ChildOne.G()");
        }
    }

    class ChildTwo : Parent //子类二继承父类
    {
        new public void F()
        {
            Console.WriteLine("ChildTwo.F()");
        }
        public override void G()
        {
            Console.WriteLine("ChildTwo.G()");
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Parent childOne = new ChildOne();
            Parent childTwo = new ChildTwo();
            //调用Parent.F()
            childOne.F();
            childTwo.F();
            //实现多态
            childOne.G();
            childTwo.G();
        }
    }
}