public void ThrowIfNullOrContainsNullDoesNotThrowIfSequenceDoesNotContainNull()
        {
            IEnumerable <TestArgumentItem> sequence = new TestArgumentItem[] { new TestArgumentItem() };

            Assert.DoesNotThrow(() => sequence.ThrowIfNullOrContainsNull("param1"));
        }
        public void ThrowIfNullOrContainsNullThrowsIfSequenceContainsNull()
        {
            IEnumerable <TestArgumentItem> sequence = new TestArgumentItem[] { null };

            Assert.Throws <ArgumentException>(() => sequence.ThrowIfNullOrContainsNull("param1"));
        }