public void DAOMemory_Delete() { IDAO <Person> db = new DAOMemory <Person>(); db.Create(new Person() { name = "Juan Carlos Sosa Peña", age = 36 }); db.Create(new Person() { name = "Ana Griselda Prada Perez", age = 35 }); // Valid Object Id Deleted db.Delete(1); Assert.Throws <InvalidOperationException>(() => db.Retrive(1)); // Invalid Object Id Updated Assert.Throws <InvalidOperationException>(() => db.Delete(1)); }