Ulrick and Birger started an air taxi service in Berlin, Germany, under the name Berlinair, Inc. Birger was approached by a group of travel agents who were interested in hiring an air charter business to take German tourists on vacation. Birger formed Air Berlin Charter Co. (ABC) and was its sole owner. On behalf of ABC, he entered into a contract with the Berlin travel agents. Birger concealed his negotiations from Ulrick, even though he used Berlinair working time, staff, money, and facilities. Birger defended his behavior on the grounds that Berlinair could not afford to enter into a contract with the travel agents. Has Birger violated the corporate opportunity doctrine?