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, "$"); }); }