一旦声明一个类型为DataContract，那么该类型就可以被序列化在服务端和客户端之间传送，如下所示。

      [DataContract]

     public class UserInfo

     {

          //….

    }

只有声明为DataContract的类型的对象可以被传送，且只有成员属性会被传递，成员方法不会被传递。WCF对声明为DataContract的类型提供更加细节的控制，可以把一个成员排除在序列化范围以外，也就是说，客户端程序不会获得被排除在外的成员的任何信息，包括定义和数据。默认情况下，所有的成员属性都被排除在外，因此需要把每一个要传送的成员声明为DataMember，如下所示。

    [DataContract]

    public class UserInfo

    {

        [DataMember]

        public string UserName

        {

            get;

            set;

        }

        [DataMember]

        public int Age

        {

            get;

            set;

        }

        [DataMember]

        public string Location

        {

            get;

            set;

        }

        [IgnoreDataMember]

        public string Zodiac

        {

            get;

            set;

        }

}    

[DataMember(Name="Name")]

public string UserName

{

     get;

     set;

}

public class User {

    public int Id { get; set; }

    public string Name { get; set; }

    [ScriptIgnore]

    public bool IsComplete

    {

        get { return Id >  && !string.IsNullOrEmpty(Name); }

    }

} 

//{ Id: 3, Name: 'Test User' }

public class Car

{

  // included in JSON

  public string Model { get; set; }

  public DateTime Year { get; set; }

  public List<string> Features { get; set; }

  // ignored

  [JsonIgnore]

  public DateTime LastModified { get; set; }

}

using Newtonsoft.Json;

using Newtonsoft.Json.Converters;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ConsoleApplication1

{

    [JsonObject(MemberSerialization.OptIn)]

    public class User

    {

        [JsonProperty(PropertyName = "ID")]

        public int Unid { get; set; }

        [JsonProperty]

        public string UserName { get; set; }

        [JsonProperty]

        [JsonConverter(typeof(IsoDateTimeConverter))]

        public DateTime CreateTime { get; set; }

        [JsonIgnoreAttribute]

        public string PasssWord { get; set; }

        public string Memo { get; set; }

        [JsonProperty("userName")]

        public string UserName{ set; get; }

    }

}

[DataContract]

public class Computer

{

  // included in JSON

  [DataMember]

  public string Name { get; set; }

  [DataMember]

  public decimal SalePrice { get; set; }

  // ignored

  public string Manufacture { get; set; }

  public int StockCount { get; set; }

  public decimal WholeSalePrice { get; set; }

  public DateTime NextShipmentDate { get; set; }

}

/// <summary>

/// 用户信息类

/// </summary>

public class UserInfo

{

    /// <summary>

    /// 名称

    /// </summary>

    public string Name { get; set; }

    /// <summary>

    /// 年龄

    /// </summary>

    public int Age { get; set; }

    /// <summary>

    /// 电子邮件

    /// </summary>

    [Newtonsoft.Json.JsonIgnore]

    [System.Web.Script.Serialization.ScriptIgnore]

    [System.Xml.Serialization.XmlIgnore]

    public string Email { get; set; }

}

static void Main(string[] args)

{

    //创建用户信息

    UserInfo user = new UserInfo();

    user.Name = "张三";

    user.Age = ;

    user.Email = "zhangsan@qq.com";

    //1、使用Newtonsoft转JSON

    string newtonStr = JsonConvert.SerializeObject(user);

    //2、使用JavaScriptSerializer类转JSON

    JavaScriptSerializer serializer = new JavaScriptSerializer();

    string serializedStr = serializer.Serialize(user);

    //3、XML序列化

    string xmlStr = XmlSerialize<UserInfo>(user);

    System.Console.ReadLine();

}

//XML序列化方法

public static string XmlSerialize<T>(T obj)

{

    using (StringWriter sw = new StringWriter())

    {

        Type t = obj.GetType();

        XmlSerializer serializer = new XmlSerializer(obj.GetType());

        serializer.Serialize(sw, obj);

        sw.Close();

        return sw.ToString();

    }

}