Moves the System.Xml.XPath.XPathNavigator to the next sibling node with the local name and namespace URI specified.
Returns true if the System.Xml.XPath.XPathNavigator is successful moving to the next sibling node; false if there are no more siblings, or if the System.Xml.XPath.XPathNavigator is currently positioned on an attribute node. If false, the position of the System.Xml.XPath.XPathNavigator is unchanged.