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子类隐藏父类的方法(通过new操作符)

namespace ConsoleApp1{       class Program    {           static void Main(string[] args)        {               Student stu = new Student();            stu.Report();            CsStudent csStudent = new CsStudent();            csStudent.Report();        }    }    class Student    {           public void Report()        {               Console.WriteLine("I'm a student");        }    }    class CsStudent : Student    {       	// 子类对父类方法进行隐藏        new public void Report()        {               Console.WriteLine("I'm a CsStudent");        }    }}

重写

重写的父类的方法时,被重写的那个父类方法要有virtual、abstract或 override标注(修饰)

namespace ConsoleApp1{       class Program    {           static void Main(string[] args)        {               Student stu = new Student();            stu.Report();            CsStudent csStudent = new CsStudent();            csStudent.Report();        }    }    class Student    {           // 用virtual关键字修饰的方法是虚拟方法        public virtual void Report()        {               Console.WriteLine("I'm a student");        }    }    class CsStudent : Student    {           public override void Report()        {               Console.WriteLine("I'm a CsStudent");        }    }}