public void WriterIsDisposable()
        {
            XPathDocument doc;

            using (XPathDocumentWriter writer = new XPathDocumentWriter())
            {
                writer.WriteElementString("hello", "world");
                doc = writer.Close();
            }

            Assert.IsNotNull(doc);
        }
        public void ShouldWriteRootElement()
        {
            XPathDocumentWriter writer = new XPathDocumentWriter();

            writer.WriteElementString("hello", "world");
            XPathDocument doc = writer.Close();

            Assert.IsNotNull(doc);

            string xml = GetXml(doc);

            Assert.AreEqual("<hello>world</hello>", xml);
        }