using ISerializable to control serialization and deserialization

[Serializable]
    public class OuterClass : ISerializable
    {
        public OuterClass()
        {
        }

        private OuterClass(SerializationInfo info, StreamingContext context)
        {
            MyField = info.GetString("MyField");
            Inner = (InnerClass)info.GetValue("Inner", typeof(InnerClass));
        }

        #region ISerializable Members

        public void GetObjectData(SerializationInfo info, StreamingContext context)
        {
            info.AddValue("MyField", MyField);
            info.AddValue("Inner",Inner);
        }

        #endregion

        public string MyField { get; set; }

        public InnerClass Inner { get; set; }
    }

    [Serializable]
    public class InnerClass : ISerializable
    {
        public InnerClass()
        {
        }

        private InnerClass(SerializationInfo info, StreamingContext context)
        {
            MyField = info.GetString("MyField");
        }

        #region ISerializable Members

        public void GetObjectData(SerializationInfo info, StreamingContext context)
        {
            info.AddValue("MyField", MyField);

        }

        #endregion

        public string MyField { get; set; }
    }