public void TestFirstElement()
{
var element1 = new HElement("div", "Content");
var element2 = new HElement("div", "Content2");
var elements = new HElement[] { null, element1, element2 };
Assert.Same(element1, elements.FirstElement().Single());
elements = new HElement[] { null };
Assert.Equal(0, elements.FirstElement().Count());
elements = null;
Assert.Equal(0, elements.FirstElement().Count());
}