A better way to query for a single node

Description:In the XmlNode class, that is the class that provides node functionality in an XMLDOM representation of an XML document, the SelectNodes (and the ancillary SelectSingleNode) method exploits the XPath query language to let you extract nodes based on logical conditions. The SelectNodes methods return a collection of XmlNode object, whereas SelectSingleNode returns only the first node that match the XPath criteria. However, a quick look at the implementation of SelectSingleNode suggests that using SelectNodes is often preferable. The following pseudocode shows the internal working of SelectSingleNode: