public void AttributesTest()
{
XElement element = new XElement("element");
Assert.IsFalse(element.AllAttributes().Any());
XAttribute attribute = new XAttribute("attribute", "value");
element = new XElement("element", attribute);
Assert.IsTrue(object.ReferenceEquals(element.AllAttributes().Single(), attribute));
XDocument document = new XDocument(element);
Assert.IsTrue(object.ReferenceEquals(document.AllAttributes().Single(), attribute));
element.Add(element);
Assert.AreEqual(2, element.AllAttributes().Count());
Assert.AreEqual(2, document.AllAttributes().Count());
}
