using System;using System.Collections.Generic;using System.Diagnostics;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;namespace _模拟磁盘打开文件{    class Program    {        static void Main(string[] args)        {            Console.WriteLine("请选择要进入的磁盘");            string path = Console.ReadLine();            Console.WriteLine("请选择要打开的文件");            string fileName = Console.ReadLine();            //文件的全路径:path+fileName            FileFather ff = GetFile(fileName,path+fileName);            ff.OpenFile();            Console.ReadKey();        }        public static FileFather GetFile(string fileName,string fullPath)//通过方法返回父类类型        {            string extension  = Path.GetExtension(fileName);//获取扩展名            FileFather ff = null;            switch(extension)            {                case ".txt": ff = new TxtPath(fullPath);//传参A                    break;                case ".jpg": ff = new JpgPath(fullPath);                    break;                case ".wmv": ff = new WmvPath(fullPath);                    break;            }            return ff;        }        public abstract class FileFather        {            public string fullPath//需要全路径 来打开，做成自动属性，存储全路径            {                get;                set;            }            //文件的全路径:fileName(fulPath)=path+fileName,合成 做一个构造函数//传参A            public FileFather(string fullPath)//传参A            {                this.fullPath = fullPath;            }            //方法1 传参，方法2 属性            public abstract void OpenFile();        }        public class TxtPath : FileFather        {            public TxtPath(string fullPath)                : base(fullPath)            {            }            public override void OpenFile()            {                //子类继承父类的属性，参数传入属性fileName                ProcessStartInfo psi = new ProcessStartInfo(this.fullPath);                Process  p = new Process();                p.StartInfo = psi;                p.Start();                        }        }        public class JpgPath  : FileFather        {            public JpgPath(string fullPath)                : base(fullPath)//构造函数，调用父类            {            }            public override void OpenFile()            {                ProcessStartInfo psi = new ProcessStartInfo(this.fullPath);                Process p = new Process();                p.StartInfo = psi;                p.Start();               }        }        public class WmvPath : FileFather        {            public WmvPath(string fullPath)                : base(fullPath)            {            }            public override void OpenFile()            {                ProcessStartInfo psi = new ProcessStartInfo(this.fullPath);                Process p = new Process();                p.StartInfo = psi;                p.Start();            }        }    }}