ref with reference types

a vivid example:       

 private void changeRef(ref object o)

        {

            o = new GCNotificationStatus();

        }

        private void change(object o)

        {

            o = new GCNotificationStatus();

        }

        protected void Button14_Click(object sender, EventArgs e)

        {

            TaiwanCalendar t = new TaiwanCalendar();

            object test = t;

            change(test);

            Response.Write(test.GetType().FullName);   

            changeRef(ref test);

            Response.Write(test.GetType().FullName);

        }