第三个案例（移动设备）

编写ModelDisk父类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Mobile
{
public abstract class ModelDisk
    {
public abstract void Read();
public abstract void Write();
    }
}

编写UDisk类继承父类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Mobile
{
public class UDisk : ModelDisk
    {
public override void Read()
        {
            Console.WriteLine("Read UDISK");
        }

public override void Write()
        {
            Console.WriteLine("Write UDISK");
        }
    }
}

主函数的编写

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Mobile
{
class Program
 {
static void Main(string[] args)
        {
            Computer c = new Computer();
//子类新建一个对象传值给父类对象
            c.MDK = new UDisk();
            c.Read();
            c.Write();
            Console.ReadKey();
        }
    }
}

Computer类的实现

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Mobile
{
public class Computer
    {
public ModelDisk MDK { get; set; }

public void Read()
        {
            MDK.Read();
        }

public void Write()
        {
            MDK.Write();
        }
    }
}