Save Option Change

Hi Every Body 

My Extension Add a Page To Option Dialog

,In My Option Page I Have Some Item And After Change Some Property As Items and Click Cancel Button,

Vs Saved My Option Page , How Can I Solve This Problem?

--Codes--

Add Page With This Line

[ProvideOptionPage(typeof(CrOptionBackUp), "My Extension", "My Page", 0, 0, true)]

and This Is My 'CrOptionBackUp' Class

class CrOptionBackUp : UIElementDialogPage
    {
        public OpBackUpView BackUpView { get; set; }
        public CrOptionBackUp()
        {
            BackUpView = new OpBackUpView();
        }

        protected override UIElement Child
        {
            get { return BackUpView; }
        }
    }

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