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格式化程序是一个知道如何将任何对象写到一个流中的对象。IFormatter

using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization.Formatters.Soap;

IFormatter formatter = new SoapFormatter();

完整代码

    [SerializableAttribute]
    public class TestClass:IDeserializationCallback,ISerializable
    {
        [NonSerializedAttribute]
        public string aa;     //不可序列化的字段
        public string mystring;
        string s = "Wahoo!";
        int n = 6;
        ArrayList oldStrings=new ArrayList();
        static string currentVersion="2.0";
        public TestClass(SerializationInfo info, StreamingContext context)
        {
            //mystring = info.GetString("MyString");
            mystring = (string)info.GetValue("MyString", typeof(string));
            string streamVersion=info.GetString("Version");
            switch(streamVersion)
            {
                case "1.0":
                    s=info.GetString("MyString");
                    n=s.Length;
                    break;
                case "2.0":
                    s=info.GetString("MyString");
                    n=s.Length;
                    oldStrings=(ArrayList)info.GetValue("OldStrings",typeof(ArrayList));
                    break;
                default:
                    string message=string.Format("Version{0} is not supported.",streamVersion);
                    throw new SerializationException(message);
                    
            }
        }
        IDeserializationCallback Members

        ISerializable Members
    }