SerializerCombine 方法 (ITextReader, Object)

public Object Combine(
	ITextReader pReader,
	Object pOriValue
)

using System;
using System.IO;
using System.Xml;

namespace XPatchLib.Example
{
    public class CombineExample
    {
        public static void Main()
        {
            var example = new CombineExample();
            example.CombineObject("patch.xml");
        }

        private void CombineObject(string filename)
        {
            OrderedItem oldOrderItem = null;
            OrderedItem newOrderItem = null;

            var serializer = new Serializer(typeof(OrderedItem));
            using (var fs = new FileStream(filename, FileMode.OpenOrCreate))
            {
                oldOrderItem = new OrderedItem
                {
                    Description = "Big Widget",
                    ItemName = "Widgt",
                    Quantity = 0,
                    UnitPrice = (decimal) 4.7
                };

                // 采用不改动现有 oldOrderItem 合并方式，将增量内容与 oldOrderItem 内容进行合并，产生新的对象实例 newOrderItem
                // newOrderItem 与 oldOrderItem 非同一对象。
                using (var reader = new XmlTextReader(fs))
                {
                    newOrderItem = (OrderedItem) serializer.Combine(reader, oldOrderItem);
                }
            }

            Console.WriteLine("OldInstance:");
            Write(oldOrderItem);
            Console.WriteLine("NewInstance:");
            Write(newOrderItem);
        }

        private void Write(OrderedItem item)
        {
            Console.WriteLine(item.ItemName);
            Console.WriteLine(item.Description);
            Console.WriteLine(item.UnitPrice);
            Console.WriteLine(item.Quantity);
            Console.WriteLine(item.GetHashCode());
            Console.WriteLine("-----");
        }

        public class OrderedItem
        {
            public string Description;
            public string ItemName;
            public int Quantity;
            public decimal UnitPrice;
        }
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<OrderedItem>
  <Description>Small Widget</Description>
  <Quantity>10</Quantity>
  <UnitPrice>2.30</UnitPrice>
</OrderedItem>

OldInstance:
Widgt
Big Widget
4.7
0
21170186
-----
NewInstance:
Widgt
Small Widget
2.30
10
13134304
-----