C#json類汎用変換

using System;
using System.Collections.Generic;
using System.Web;
using System.Runtime.Serialization.Json;
using System.Linq;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;

namespace JsonHelper
{
    public class JsonClass
    {

        /// <summary>
        /// Json   
        /// </summary>
        /// <typeparam name="T">    </typeparam>
        /// <param name="t">     </param>
        /// <returns></returns>
        public static string JsonSerializer<T>(T t)
        {

            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));

            MemoryStream ms = new MemoryStream();

            ser.WriteObject(ms, t);

            string jsonString = Encoding.UTF8.GetString(ms.ToArray());

            ms.Close();
            string p = @"\\/Date\((\d+)\+\d+\)\\/";

            MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);

            Regex reg = new Regex(p);

            jsonString = reg.Replace(jsonString, matchEvaluator);



            return jsonString;

        }

        /// <summary>
        /// Json    
        /// </summary>
        /// <typeparam name="T">    </typeparam>
        /// <param name="jsonString">    json   </param>
        /// <returns></returns>
        public static T JsonDeserialize<T>(string jsonString)
        {

            string p = @"\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}";

            MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertDateStringToJsonDate);

            Regex reg = new Regex(p);

            jsonString = reg.Replace(jsonString, matchEvaluator);


            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));

            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));

            T obj = (T)ser.ReadObject(ms);

            return obj;

        }



        private static string ConvertJsonDateToDateString(Match m)
        {

            string result = string.Empty;

            DateTime dt = new DateTime(1970, 1, 1);

            dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value));

            dt = dt.ToLocalTime();

            result = dt.ToString("yyyy-MM-dd HH:mm:ss");

            return result;

        }




        private static string ConvertDateStringToJsonDate(Match m)
        {

            string result = string.Empty;

            DateTime dt = DateTime.Parse(m.Groups[0].Value);

            dt = dt.ToUniversalTime();

            TimeSpan ts = dt - DateTime.Parse("1970-01-01");

            result = string.Format("\\/Date({0}+0800)\\/", ts.TotalMilliseconds);

            return result;

        }



    }




}