class Program
 {
 static void Main(string[] args)
 {
  var user = new User { UserId = "sb", CreateDate = DateTime.Now };
  var serialier = new JavaScriptSerializer();
  var json = serialier.Serialize(user);
  Console.WriteLine(json);
  Console.Read(); 
 }
 }

 /// <summary>
 /// 用户类.
 /// </summary>
 public class User
 {
 /// <summary>
 /// 用户Id
 /// </summary>
 public string UserId { get; set; }

 /// <summary>
 /// 创建时间
 /// </summary>
 public DateTime CreateDate { get; set; }

 }

class Program
 {
 static void Main(string[] args)
 {
  var user = new User { UserId = "sb", CreateDate = DateTime.Now };
  var serialier = new JavaScriptSerializer();
  var json = serialier.Serialize(user);
  var jsonNomal = LocalSerialize(user);
  Console.WriteLine("js序列化：" + json);
  Console.WriteLine("本地序列化：" + jsonNomal);
  Console.Read();
 }

 public static string LocalSerialize(object obj)
 {
  var jser = new JavaScriptSerializer();
  var json = jser.Serialize(obj);
  //将时间格式转换为适合阅读习惯的格式
  json = Regex.Replace(json, @"\\/Date\((\d+)\)\\/", match =>
  {
  DateTime dt = new DateTime(1970, 1, 1);
  dt = dt.AddMilliseconds(long.Parse(match.Groups[1].Value));
  dt = dt.ToLocalTime(); //本地时间
  return dt.ToString(); ;
  });
  return json;
 }
 }

 /// <summary>
 /// 用户类.
 /// </summary>
 public class User
 {
 /// <summary>
 /// 用户Id
 /// </summary>
 public string UserId { get; set; }

 /// <summary>
 /// 创建时间
 /// </summary>
 public DateTime CreateDate { get; set; }
 }