/// <summary>
    /// 员工信息实体
    /// </summary>
    [DataContract(Namespace = "http://micromouse.cnblogs.com")]
    public class EmployeeEntity
    {
        /// <summary>
        /// 员工ID
        /// </summary>
        [DataMember(Order = 0)]
        public string EmployeeID { get; set; }

        /// <summary>
        /// 员工姓名
        /// </summary>
        [DataMember(Order = 1)]
        public string EmployeeName { get; set; }

        /// <summary>
        /// 出生日期
        /// </summary>
        [DataMember(Order = 2)]
        public DateTime BirthdayDate { get; set; }

        /// <summary>
        /// 地址信息
        /// </summary>
        [DataMember(Order = 3)]
        public AddressinfoEntity AddressInfo { get; set; }
    }

    /// <summary>
    /// 地址信息实体
    /// </summary>
    [DataContract(Namespace = "http://micromouse.cnblogs.com")]
    public class AddressinfoEntity
    {
        /// <summary>
        /// 街道名称 
        /// </summary>
        [DataMember(Order = 0)]
        public string StreetName { get; set; }

        /// <summary>
        /// 门牌号
        /// </summary>
        [DataMember(Order = 1)]
        public string HouseNumber { get; set; }
    }

        /// <summary>
        /// 序列化JSON(将对象序列化为JSON字符串)
        /// </summary>
        protected void btnSerializeJSON_Click(object sender, EventArgs e)
        {
            var employeeEntity = new EmployeeEntity()
            {
                EmployeeID = Guid.NewGuid().ToString(""),
                EmployeeName = "张三",
                BirthdayDate = DateTime.Now,
                AddressInfo = new AddressinfoEntity()
                {
                    StreetName = "一环路北三段55号",
                    HouseNumber = "55"
                }
            };

            var serializer = new DataContractJsonSerializer(typeof(EmployeeEntity));
            using (var stream = new MemoryStream())
            {
                serializer.WriteObject(stream, employeeEntity);
                byte[] dataBytes = new byte[stream.Length];

                stream.Position = 0;
                stream.Read(dataBytes, 0, dataBytes.Length);
                txtJSON.Text = Encoding.UTF8.GetString(dataBytes);
            }
        }

        /// <summary>
        /// 反序列化JSON(将JSON字符串反序列化为对象)
        /// </summary>
        protected void btnDeserializeJSON_Click(object sender, EventArgs e)
        {
            var serializer = new DataContractJsonSerializer(typeof(EmployeeEntity));

            using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(txtJSON.Text)))
            {
                EmployeeEntity employeeEntity = serializer.ReadObject(stream) as EmployeeEntity;

                txtDeJSON.Text = string.Format("employeename=[{0}]\r\n", employeeEntity.EmployeeName);
                txtDeJSON.Text += string.Format("birthdaydate=[{0}]\r\n", employeeEntity.BirthdayDate);
                txtDeJSON.Text += string.Format("streetname=[{0}]", employeeEntity.AddressInfo.StreetName);
            }
        }

序列化后结果如下:

{
    "EmployeeID":"abfc39fe-e988-4d01-b70c-1b07caa1bec0",
    "EmployeeName":"张三",
    "BirthdayDate":"\/Date(1278049399906+0800)\/",
    "AddressInfo":{
        "StreetName":"一环路北三段55号",
        "HouseNumber":"55"
    }
}

反序列化后结果如下:

employeename=[张三]
birthdaydate=[2010/7/2 13:43:19]
streetname=[一环路北三段55号]