Changes the XmlReader.ReadState to Closed.
The System.Xml.XmlValidatingReader class is obsolete in dnprdnext. You can create a validating System.Xml.XmlReader instance by using the System.Xml.XmlReaderSettings class and the erload:System.Xml.XmlReader.Create method. For more information, see Validating XML Data with XmlReader.
This method also releases any resources held while reading. If this reader was constructed by using an System.Xml.XmlTextReader, this method also calls Close on the underlying reader. If this reader was constructed by using a stream, this method also calls Close on the underlying stream.
If Close has already been called, no action is performed.