用new重写基类方法与用override重写基类方法有何区别?

Question

如题
我都搞糊涂了!

Answer 1

//Base.cs
namespace Hiding
{
    public class Base
    {
        public virtual void Method1()
        {
            Console.WriteLine("Base.Method1 called");
        }
        public virtual void Method2()
        {
            Console.WriteLine("Base.Method2 called");
        }
    }
}//Derived.cs
namespace Hiding
{
    public class Derived : Base
    {
        public override void Method1()
        {
            Console.WriteLine("Derived.Method1 called");
        }        public new void Method2()
        {
            Console.WriteLine("Derived.Method2 called");
        }
    }
}//Test.cs
namespace Hiding
{
    class Test
    {
        static void Main(string[] args)
        {
    Derived d = new Derived();
    Base b = d;            d.Method1();
    d.Method2();            b.Method1();
    b.Method2();
        }
    }
}
看运行结果

Answer 2

new 是隐藏，override是复写