public void ShouldThrowArgumentExceptionWhenOneOrMoreElementsAreNull()
        {
            Assert.Throws <ArgumentException>(delegate()
            {
                ParameterizedStringPart[] parts = new ParameterizedStringPart[2];
                parts[0] = new ParameterizedStringPartParameter("name");
                parts[1] = null;

                ParameterizedString s =
                    ParameterizedString.FromParameterizedStringPartCollection(parts, "$");
            });
        }