C#中new和override的区别

public class GrandClass//基类
{
        public GrandClass()
        {
                Console.WriteLine("In GrandClass.Constructor");
        }
        public virtual void Method()//用virtual才可以在子类中用override,而new不需要这样
        {
                Console.WriteLine("In GrandClass.Method()");
        }
}

public class ParentClass:GrandClass//继承基类,看看override状态
{
        public ParentClass()
         {
                 Console.WriteLine("In ParentClass.Constructor");
         }
        public override void Method()//使用override,是说把基类的方法重新定义
         {
                 Console.WriteLine("In ParentClass.Method() use override");
         }
}

public class NewParentClass:GrandClass//继承基类,看看new状态
{
        public NewParentClass()
         {
                 Console.WriteLine("In NewParentClass.Constructor");
         }
        new public void Method()//使用new,不是说用到基类的方法,而是重新定义一个子类方法,只不过,方法名称与基类相同
         {
                 Console.WriteLine("In NewParentClass.Method()");
         }
}

static void Main()
{
         GrandClass Parent=(GrandClass)new ParentClass();//用override子类加框一个基类对象句柄
         Parent.Method();
         GrandClass NewParent=(GrandClass)new NewParentClass();//用new子类加框一个基类对象句柄
         NewParent.Method();
         NewParentClass NewParent1=new NewParentClass();//一个子类句柄
         NewParent1.Method();
}

[1]In GrandClass.Constructor
[2]In ParentClass.Constructor
[3]In ParentClass.Method() use override
[4]In GrandClass.Constructor
[5]In NewParentClass.Constructor
[6]In GrandClass.Method()
[7]In GrandClass.Constructor
[8]In NewParentClass.Constructor
[9]In NewParentClass.Method()