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using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;namespace Sys
{
    [Serializable] //指示一个类可以序列化
    public class Element
    {
        //复制对象
        public object DeepClone()
        {
            object result = null;
            using (MemoryStream ms = new MemoryStream()) //内存流
            {
                BinaryFormatter bf = new BinaryFormatter();//以二进制格式序列化对象
                bf.Serialize(ms, this);//将对象序列化为内存流
                ms.Seek(0, SeekOrigin.Begin);
                result = bf.Deserialize(ms); //将内存流反序列化为对象
            }
            return result;
        }//保存对象到文件
        //(对象序列化到ms)→(ms写入byte[])→(byte[]写入流)
        public void WriteInstanceToFile(string fileName)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                BinaryFormatter bf = new BinaryFormatter();
                bf.Serialize(ms, this);
                ms.Seek(0, SeekOrigin.Begin);
                byte[] buffer = new byte[ms.Length];
                ms.Read(buffer, 0, buffer.Length);
                ms.Seek(0, SeekOrigin.Begin);

                FileStream stream 

= new FileStream(fileName, FileMode.Create);
                stream.Write(buffer,0,buffer.Length);
            }
        }//从文件中读取对象
        public static object ReadInstanceFromFile(string fileName)
        {
            object result = null;
            FileStream stream = new FileStream(fileName, FileMode.Open);//以二进制格式序列化对象
            BinaryFormatter bf = new BinaryFormatter();
            result = bf.Deserialize((Stream)stream); //流反序列化为对象
            stream.Close();
            return result;
        }
    }
}