ed on it to his detriment." Klinke v. Famous Recipe Fried Chicken, Inc., 94 Wn.2d 255, 616 P.2d 644, 647 (Wash. 1980); see also Lige Dickson Co. v. Union Oil Co. of Calif, 96 Wn.2d 291, 635 P.2d 103, 105 (Wash. 1981) ([D]efendant's failure to reduce the agreement with plaintiff to a writing, and plaintiff's