pass a multiple key value to different page

hi all,
i would like to pass multiple key value to another page.
how to do it?
public override object Key { get { try { // how to return 3 key value? return (this.SearchFields[(int)SearchFieldIndex.ProductID].Value); return (this.SearchFields[(int)SearchFieldIndex.PriceScale].Value); return (this.SearchFields[(int)SearchFieldIndex.DiscountDesc].Value); } catch { return(null); } } }