public void Add_New_Email_With_ID_Eq_1()
        {
            // A-A-A

            // Arrange
            var emails_data    = new EmailsDataInMemory();
            var email          = new Email();
            var expected_id    = 1;
            var expected_count = 1;

            // Act
            emails_data.Add(email);
            var db_email     = emails_data.GetById(1);
            var actual_id    = db_email.Id;
            var actual_count = emails_data.GetAll().Count();

            // Assert
            Assert.AreEqual(expected_id, actual_id);
            Assert.AreEqual(expected_count, actual_count);

            //StringAssert.
            //CollectionAssert.
        }
 public void Creation()
 {
     var emails_data = new EmailsDataInMemory();
 }