MSDN の ISeriarize インターフェイスの使用例。

EntryPoint.cs

using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Security.Permissions;


[assembly: SecurityPermission( SecurityAction.RequestMinimum, Execution = true )]
namespace demo.serialize {


    /// <summary>
    ///
    /// </summary>
    class EntryPoint {
        /// <summary>
        /// 
        /// </summary>
        /// <param name="args"></param>
        public void run(string[] args) {
            BinaryFormatter binary_formatter = new BinaryFormatter();
            Person john = new Person();
            john.IdNumber = 1010;
            john.Name = "John Smith";

            FileStream stream = new FileStream( "person.bin", FileMode.OpenOrCreate );
            binary_formatter.Serialize( stream, john );
            stream.Close();
            Console.WriteLine( "original name: {0}, original id: {1}", john.Name, john.IdNumber );

            // Deserialize.
            stream = new FileStream( "person.bin", FileMode.OpenOrCreate );
            Person smith = (Person)binary_formatter.Deserialize( stream );
            Console.WriteLine( "new name: {0}, new id: {1}", smith.Name, smith.IdNumber );
            stream.Close();
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args) {
            EntryPoint progn = new EntryPoint();
            
            try {
                progn.run( args );
            } catch ( Exception e ) {
                Console.WriteLine( "{0}: {1}", e.Message, e.StackTrace );
            } finally {
                Console.Write( "press enter to exit...." );
                Console.ReadLine();
            }
        }
    }


}

Person.cs

using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Security.Permissions;


namespace demo.serialize {


    /// <summary>
    ///
    /// </summary>
    [Serializable]
    public class Person : ISerializable {
        /// <summary>
        /// 
        /// </summary>
        private string name_value_;
        /// <summary>
        /// 
        /// </summary>
        private int id_value_;


        /// <summary>
        /// 
        /// </summary>
        public Person() { }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="info"></param>
        /// <param name="context"></param>
        protected Person(SerializationInfo info, StreamingContext context) {
            if ( info == null )
                throw new ArgumentNullException( "info" );
            
            name_value_ = (string)info.GetValue( "alt_name", typeof( string ) );
            id_value_ = (int)info.GetValue( "alt_id", typeof( int ) );
        }


        /// <summary>
        /// 
        /// </summary>
        public string Name {
            get { return name_value_; }
            set { name_value_ = value; }
        }


        /// <summary>
        /// 
        /// </summary>
        public int IdNumber {
            get { return id_value_; }
            set { id_value_ = value; }
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="info"></param>
        /// <param name="context"></param>
        [SecurityPermission( SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.SerializationFormatter )]
        public virtual void GetObjectData(SerializationInfo info, StreamingContext context) {
            if ( info == null )
                throw new System.ArgumentNullException( "info" );

            info.AddValue( "alt_name", this.Name );
            info.AddValue( "alt_id", this.IdNumber );
        }
    }


}