Cooper v. East Penn School District - Commonwealth Court - July 26, 2006
http://www.courts.state.pa.us/OpPosting/CWealth/out/2430CD05_7-26-06.pdf
"Unjust enrichment is an equitable doctrine implying that a contract exists when a party is found to have unfairly benefited by another's actions....However, unjust enrichment is inapplicable where the parties' relaltionship is founded upon a written agreement, regardless of how 'harsh the provisions of such contracfts may seem in light of the subsequent happenings.'"
