Changes the XmlNodeReader.ReadState to Closed.
In the dnprdnext, the recommended practice is to create System.Xml.XmlReader instances using the System.Xml.XmlReaderSettings class and the erload:System.Xml.XmlReader.Create method. This allows you to take full advantage of all the new features introduced in the dnprdnshort. For more information, see Creating XML Readers.
This method also releases any resources held while reading. If Close has already been called, no action is performed.