XPath - Select all Nodes in XML without using Tag Name with C# and VB.Net

Here Mudassar Ahmed Khan has explained with an example, how to select all Nodes (Elements) in XML without specifying (particular) Node Name (Tag Name) using XPath Query (Expression) with C# and VB.Net. The XML file will be loaded into an XmlDocument and then using XPath Query (Expression), all the Nodes (Elements) in the XML will be selected.