Model m = new Model { Id = 1, Dt = DateTime.Now };          JavaScriptSerializer js = new JavaScriptSerializer();         string str = js.Serialize(m);         str = Regex.Replace(str, @"\\/Date\((\d+)\)\\/", match =>          {             DateTime dt = new DateTime(1970, 1, 1);             dt = dt.AddMilliseconds(long.Parse(match.Groups[1].Value));             dt = dt.ToLocalTime();            return dt.ToString("yyyy-MM-dd HH:mm:ss");         });         Response.Write(str); //{"Id":1,"Dt":"2011-08-17 17:38:47"}