using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Data;

using System.IO;

using System.Runtime.Serialization.Formatters.Binary;

namespace PromTest

{

    class Program

    {

        static void Main(string[] args)

        {

            DataSet ds = new DataSet();

            DataTable table = new DataTable("tab1");

            ds.Tables.Add(table);

            table.Columns.Add(new DataColumnEx() { ItemCategory = "测试" });

            BinSerialize(ds);

            object obj = BinDeserialize();

            if (((DataSet)obj).Tables[].Columns[] is DataColumnEx)

            {

                Console.WriteLine((((DataSet)obj).Tables[].Columns[] as DataColumnEx).ItemCategory);

            }

            Console.Read();

        }

        static void BinSerialize(object info)

        {

            using (Stream stream = new FileStream("c:\\a.bin", FileMode.Create, FileAccess.Write))

            {

                BinaryFormatter bf = new BinaryFormatter();

                bf.Serialize(stream, info);

            }

        }

        static object BinDeserialize()

        {

            using (Stream stream = new FileStream("a.bin", FileMode.Open, FileAccess.Read))

            {

                BinaryFormatter bf = new BinaryFormatter();

                return bf.Deserialize(stream);

            }

        }

    }

    public class DataColumnEx : DataColumn

    {

        public string ItemCategory

        { get; set; }

    }

}