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首先建2个类，它们的命名空间不一样，但类名和结构相同：

代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace Domain1 {
    public class Person {
        public int Id { get; set; }
        public string Name { get; set; }
    }
}using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace Domain2 {
    public class Person {
        public int Id { get; set; }
        public string Name { get; set; }
    }
}

然后在Program.cs里对Domain1.Person进行序列化：

代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;
using System.IO;
using Domain1;namespace ConsoleApplication1 {
    class Program {
        static void Main(string[] args) {
            Person person = new Person { Id = 1, Name = "Who" };
            XmlSerializer serializer = new XmlSerializer(typeof(Person));
            using (FileStream fs = new FileStream("d:\\person.xml", FileMode.Create)) {
                serializer.Serialize(fs, person);
            }
            Console.WriteLine(
"ID:{0}   Name:{1}", person.Id, person.Name);
            Console.Read();
        }
    }
}

运行程序，会在D盘生成Domain1.Person对象的XML文件person.xml，

然后修改下程序，用Domain2.Person对D:\person.xml进行反序列化：

代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;
using System.IO;
using Domain2;namespace ConsoleApplication1 {
    class Program {
        static void Main(string[] args) {
            Person person = null;
            XmlSerializer serializer = new XmlSerializer(typeof(Person));
            using (FileStream fs = new FileStream("d:\\person.xml", FileMode.Open)) {
                person = serializer.Deserialize(fs) as Person;
            }
            Console.WriteLine(
"ID:{0}   Name:{1}", person.Id, person.Name);
            Console.Read();
        }
    }
}

运行程序，成功反序列化。

如果在Domain1.Person类中增加或者减少属性，用Domain2.Person同样可以反序列化。