public void TwoInstances_DifferentIdPropertySet_AreNotEqual()
        {
            var sut1 = new DomainEntity { Id = 4275 };
            var sut2 = new DomainEntity { Id = 3214 };

            sut1.ShouldNotEqual(sut2);
        }
        public void TwoInstances_SameIdPropertySet_AreEqual()
        {
            const int commonId = 32753;
            var sut1 = new DomainEntity {Id = commonId};
            var sut2 = new DomainEntity {Id = commonId};

            sut1.ShouldEqual(sut2);
        }