c#两种方式 dataset 与byte[] 字节的转换

sing System;using System.Collections.Generic;using System.Text;using System.Security.Cryptography;using System.Xml;using System.IO;using System.Text.RegularExpressions;using System.Data;using System.Runtime.Serialization;using System.Runtime.Serialization.Formatters.Binary;            /// <summary>       /// dataset 转转换byte[] 字节       /// </summary>       /// <param name="str"></param>       public static byte[] DataToByte(DataSet ds)        {            byte[] bArrayResult = null;            ds.RemotingFormat = SerializationFormat.Binary;            MemoryStream ms = new MemoryStream();            IFormatter bf = new BinaryFormatter();            bf.Serialize(ms, ds);            bArrayResult = ms.ToArray();            ms.Close();            ms.Dispose();            return bArrayResult;        }        /// <summary>       /// byte[] 字节转datasheet       /// </summary>       /// <param name="bArrayResult"></param>       /// <returns></returns>        public static DataSet ByteToDataset(byte[] bArrayResult)           {               DataSet dsResult = new DataSet();               MemoryStream ms = new MemoryStream(bArrayResult);               IFormatter bf = new BinaryFormatter();               object obj = bf.Deserialize(ms);               dsResult = (DataSet)obj;               ms.Close();               ms.Dispose();            return dsResult;                           }        /// <summary>       /// 第二种方法转换       /// </summary>       /// <param name="ds"></param>       /// <returns></returns>       public static byte[] GetBinaryFormatDataSet(DataSet ds)        {             //创建内存流             MemoryStream memStream = new MemoryStream();             //产生二进制序列化格式             IFormatter formatter = new BinaryFormatter();             //指定DataSet串行化格式是二进制             ds.RemotingFormat = SerializationFormat.Binary;             //串行化到内存中             formatter.Serialize(memStream, ds);             //将DataSet转化成byte[]             byte[] binaryResult = memStream.ToArray();             //清空和释放内存流             memStream.Close();             memStream.Dispose();             return binaryResult;         }       /// <summary>       ///  第二种方法转换       /// </summary>       /// <param name="binaryData"></param>       /// <returns></returns>        public static DataSet RetrieveDataSet(byte[] binaryData)        {              //创建内存流                MemoryStream memStream = new MemoryStream(binaryData);                memStream.Seek(0, SeekOrigin.Begin);                //产生二进制序列化格式                IFormatter formatter = new BinaryFormatter();                //反串行化到内存中                object obj = formatter.Deserialize(memStream);                //类型检验                if (obj is DataSet)                {                    DataSet dataSetResult = (DataSet)obj;                    return dataSetResult;                }                else                {                    return null;                }                    }