public void Test_CopyTo_TestUser()
        {
            TestUser user1 = new TestUser();
            user1.ID = Guid.NewGuid();
            user1.FirstName = "Before";

            TestUser user2 = new TestUser();

            user1.CopyTo(user2);

            Assert.AreEqual(user1.FirstName, user2.FirstName, "The first name wasn't transferred.");
        }