public static void NotEqualsOperator___Should_return_false___When_both_sides_of_operator_are_null()
            {
                // Arrange
                ModelEqualityPrivateSetReadOnlyCollection systemUnderTest1 = null;
                ModelEqualityPrivateSetReadOnlyCollection systemUnderTest2 = null;

                // Act
                var actual = systemUnderTest1 != systemUnderTest2;

                // Assert
                actual.AsTest().Must().BeFalse();
            }
            public static void Equals_with_ModelEqualityPrivateSetReadOnlyCollection___Should_return_false___When_parameter_other_is_null()
            {
                var scenarios = EquatableTestScenarios.ValidateAndPrepareForTesting();

                foreach (var scenario in scenarios)
                {
                    // Arrange
                    ModelEqualityPrivateSetReadOnlyCollection systemUnderTest = null;

                    // Act
                    var actual = scenario.ReferenceObject.Equals(systemUnderTest);

                    // Assert
                    actual.AsTest().Must().BeFalse(because: scenario.Id);
                }
            }
            public static void NotEqualsOperator___Should_return_true___When_one_side_of_operator_is_null_and_the_other_side_is_not_null()
            {
                var scenarios = EquatableTestScenarios.ValidateAndPrepareForTesting();

                foreach (var scenario in scenarios)
                {
                    // Arrange
                    ModelEqualityPrivateSetReadOnlyCollection systemUnderTest = null;

                    // Act
                    var actual1 = systemUnderTest != scenario.ReferenceObject;
                    var actual2 = scenario.ReferenceObject != systemUnderTest;

                    // Assert
                    actual1.AsTest().Must().BeTrue(because: scenario.Id);
                    actual2.AsTest().Must().BeTrue(because: scenario.Id);
                }
            }