C# xml 转对象

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Serialization;

namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
            string stream = "<request><ship_package_list><ship_package><mail_company_name>中国邮政</mail_company_name><mail_no>123456789</mail_no></ship_package></ship_package_list><main_purchase_order_no>40627867847799</main_purchase_order_no><sub_order_list><sub_order><product_id>621540814494</product_id><sub_purchase_order_no>40627867857772</sub_purchase_order_no><product_title>测试商品3 非请勿下单</product_title></sub_order><sub_order><product_id>621541154070</product_id><sub_purchase_order_no>40627867867745</sub_purchase_order_no><product_title>测试商品2 非请勿下单</product_title></sub_order></sub_order_list></request>";
           
            //StringReader reader = new StringReader(stream);
            //XmlSerializer xmlSerializer = new XmlSerializer(typeof(object));
            //object obj = xmlSerializer.Deserialize(reader);
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(stream.ToString());
            string jsonText = Newtonsoft.Json.JsonConvert.SerializeXmlNode(doc);
            object a = Newtonsoft.Json.JsonConvert.DeserializeObject<object>(jsonText);
            QiMenDeliveredModel model = new QiMenDeliveredModel();
            try
            {
                using (StringReader sr = new StringReader(stream))
                {
                    XmlSerializer serializer = new XmlSerializer(typeof(QiMenDeliveredModel));

                    model = serializer.Deserialize(sr) as QiMenDeliveredModel;

                }
            }
            catch (Exception ex)
            {
            }
            try
            {
                RequestModel<ship_package, Delivered_Sub_Order> m = Newtonsoft.Json.JsonConvert.DeserializeObject<RequestModel<ship_package, Delivered_Sub_Order>>(jsonText);

                model.main_purchase_order_no = m.request.main_purchase_order_no;
                List<Delivered_Sub_Order> list = new List<Delivered_Sub_Order>();
                list.Add(m.request.sub_order_list.sub_order);
                model._Delivered_Sub_Order = list;
                List<ship_package> lists = new List<ship_package>();
                lists.Add(m.request.ship_package_list.ship_package);
                model._ship_package_list = lists;
            }
            catch (Exception ex)
            {

            }
            try
            {
                RequestModel<ship_package, List<Delivered_Sub_Order>> m = Newtonsoft.Json.JsonConvert.DeserializeObject<RequestModel<ship_package, List<Delivered_Sub_Order>>>(jsonText);

                model.main_purchase_order_no = m.request.main_purchase_order_no;
                List<Delivered_Sub_Order> list = new List<Delivered_Sub_Order>();
                foreach (var item in m.request.sub_order_list.sub_order)
                {
                    list.Add(item);
                }
                model._Delivered_Sub_Order = list;
                List<ship_package> lists = new List<ship_package>();
                lists.Add(m.request.ship_package_list.ship_package);
                model._ship_package_list = lists;
            }
            catch (Exception ex)
            {

            }
            try
            {

                RequestModel<List<ship_package>, Delivered_Sub_Order> m = Newtonsoft.Json.JsonConvert.DeserializeObject<RequestModel<List<ship_package>, Delivered_Sub_Order>>(jsonText);
                model.main_purchase_order_no = m.request.main_purchase_order_no;
                List<Delivered_Sub_Order> list = new List<Delivered_Sub_Order>();
                list.Add(m.request.sub_order_list.sub_order);
                model._Delivered_Sub_Order = list;
                List<ship_package> lists = new List<ship_package>();
                foreach (var item in m.request.ship_package_list.ship_package)
                {
                    lists.Add(item);
                }
                model._ship_package_list = lists;
            }
            catch (Exception ex)
            {
            }
            try
            {
                RequestModel<List<ship_package>, List<Delivered_Sub_Order>> m = Newtonsoft.Json.JsonConvert.DeserializeObject<RequestModel<List<ship_package>, List<Delivered_Sub_Order>>>(jsonText);
                model.main_purchase_order_no = m.request.main_purchase_order_no;
                List<Delivered_Sub_Order> list = new List<Delivered_Sub_Order>();
                foreach (var item in m.request.sub_order_list.sub_order)
                {
                    list.Add(item);
                }
                model._Delivered_Sub_Order = list;
                List<ship_package> lists = new List<ship_package>();
                foreach (var item in m.request.ship_package_list.ship_package)
                {
                    lists.Add(item);
                }
                model._ship_package_list = lists;
            }
            catch (Exception ex)
            {
            }
           
            string s = "1";
        }
    }

    /// <summary>
    /// 发货
    /// </summary>
    [XmlRoot(ElementName = "request")]
    [Serializable]
    public class QiMenDeliveredModel
    {
        /// <summary>
        /// 发货包裹列表
        /// </summary>
        [XmlArray("ship_package_list"), XmlArrayItem("ship_package")]
        public List<ship_package> _ship_package_list { get; set; }

        /// <summary>
        /// 主采购单号
        /// </summary>
        public string main_purchase_order_no { get; set; }

        /// <summary>
        /// 子采购单列表
        /// </summary>
        [XmlArray("sub_order_list"), XmlArrayItem("sub_order")]
        public List<Delivered_Sub_Order> _Delivered_Sub_Order { get; set; }

    }

    /// <summary>
    /// 发货包裹
    /// </summary>
    public class ship_package
    {
        /// <summary>
        /// 物流发货公司
        /// </summary>
        public string mail_company_name { get; set; }

        /// <summary>
        /// 运单号
        /// </summary>
        public string mail_no { get; set; }
    }

    /// <summary>
    /// 子采购单
    /// </summary>
    public class Delivered_Sub_Order
    {
        /// <summary>
        /// 商家编码
        /// </summary>
        public string merchant_code { get; set; }

        /// <summary>
        /// 仓内货品外部编码
        /// </summary>
        public string goods_outer_id { get; set; }

        /// <summary>
        /// 产品id
        /// </summary>
        public string product_id { get; set; }

        /// <summary>
        /// 子采购单单号
        /// </summary>
        public string sub_purchase_order_no { get; set; }

        /// <summary>
        /// 产品SKU ID
        /// </summary>
        public string sku_id { get; set; }

        /// <summary>
        /// 产品标题
        /// </summary>
        public string product_title { get; set; }

        /// <summary>
        /// 产品编码
        /// </summary>
        public string product_number { get; set; }
    }

    public class RequestModel<SPT, SUT>
    {
        public QiMenDeliveredJsonModel<SPT, SUT> request { get; set; }
    }

    public class QiMenDeliveredJsonModel<SPT, SUT>
    {
        /// <summary>
        /// 发货包裹列表
        /// </summary>
        public ShipPackageList<SPT> ship_package_list { get; set; }

        /// <summary>
        /// 主采购单号
        /// </summary>
        public string main_purchase_order_no { get; set; }

        /// <summary>
        /// 子采购单列表
        /// </summary>
        public SubOrderList<SUT> sub_order_list { get; set; }

    }
    public class ShipPackageList<T>
    {
        public T ship_package { get; set; }
    }

    public class SubOrderList<T>
    {
        public T sub_order { get; set; }
    }
}