C#对象序列化、反序列化

必须添加引用：
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;

方法：
       #region 对象序列化
        /// <summary>
        /// 对象序列化
        /// </summary>
        /// <param name="obj">任意对象</param>
        /// <returns>字符串</returns>
        public static string SerializeObject(object obj)
        {
            IFormatter formatter = new BinaryFormatter();
            string result = string.Empty;
            using(MemoryStream stream = new MemoryStream())
            {
                formatter.Serialize(stream,obj);
                byte[] byt = new byte[stream.Length];
                byt = stream.ToArray();
                //result = Encoding.UTF8.GetString(byt, 0, byt.Length); //用其他编码会有异常：SerializationException: 二进制流“0”不包含有效的 BinaryHeader。
                result = Convert.ToBase64String(byt);
                stream.Flush();
            }
            return result;
        }
        #endregion

        #region 反序列化
        /// <summary>
        /// 反序列化
        /// </summary>
        /// <param name="str">字符串</param>
        /// <returns>对象</returns>
        public static object DeserializeObject(string str)
        {
            IFormatter formatter = new BinaryFormatter();
            //byte[] byt = Encoding.UTF8.GetBytes(str); //用其他编码会有异常：SerializationException: 二进制流“0”不包含有效的 BinaryHeader。
            byte[] byt = Convert.FromBase64String(str);
            object obj = null;
            using(Stream stream = new MemoryStream(byt,0,byt.Length))
            {
                obj = formatter.Deserialize(stream);
            }
            return obj;
        }
        #endregion

说明：在使用前必须在需要序列化的对象（比如实体）前加关键字：[Serializable]