public void xml_document() { Assert.Throws<ArgumentNullException>(() => XmlExtensions.XmlDocument(null)); Assert.Throws<XmlException>(() => TextReader.Null.XmlDocument()); const string Xml = "<?xml version=\"1.0\" encoding=\"utf-16\"?><article>text</article>"; using (var reader = new StringReader(Xml)) { Assert.Equal(Xml, reader.XmlDocument().String()); Assert.Equal(-1, reader.Read()); } using (var reader = new StringReader(Xml)) { Assert.Equal(Xml, reader.XmlDocument(true).String()); Assert.Throws<ObjectDisposedException>(() => reader.Read()); } }