继承成员“Example5_6.Vehicle.Owner.get”未被标记为 virtual

Question

using System;
using System.Collections.Generic;
using System.Text;namespace Example5_6
{
    public enum owner
    { 
    Person,
     Company,
        Other
    };
    abstract public class Vehicle
    {
        private string _brand;//商标
        public virtual string Brand
        {
            get
            {
                return _brand;
            }
        }
        private owner _owner;        public owner Owner
        {
            get { return _owner; }
            set { _owner = value; }
        }
    }
    protected string card;
    public abstract string Card
{
  get ;
    set;
}
}
    class car : Vehicle
    {
        public override string Brand
        {
            get
            {
                return base.Brand;
            }
        }
        public override owner Owner
        {
            get
            {
                return base.Owner;
            }
        }
        public override string Card
        {
            get
            {
                return card;
            }
            set
            {
                card = value;
            }
        }
    }    class Program
    {
        static void Main(string[] args)
        {
            car c = new car();
            //c.Brand="奔驰";
            c.Owner = owner.Company;
            c.Card = "yua110";
            Console.WriteLine("{o},{1}",c.Owner ,c.Card);
            Console.WriteLine("Please  enter any key toterminate");
            Console.Read();        }
    }
}

Answer 1

要被标记为virtual的才能重写啊
如下：
    class c1
    {
        int intMyProperty;
        public virtual int MyProperty 
        { 
            get
            {
                return intMyProperty;
            }
            set
            {
                intMyProperty=value;
            }
        }
    }    class c2 : c1
    {
        int intMyProperty1;        public override int MyProperty
        {
            get
            {
                return intMyProperty1+3;
            }
            set
            {
                intMyProperty1 = value;
            }
        }
    }

Answer 2

方法也是一样 要重写父类对象 需要加上关键字“virtual ”然后子类才能“override ”