This sample works by using an in-memory databases that has to be initialized each time the application is began. There have to be an merchandise within the database before you decide to create a Set phone. Simply call GET to be sure you will find an product within the database https://hire-sameone-to-do-asp-ne67799.angelinsblog.com/26314701/pay-someone-to-take-asp-net-homework-an-overview