How can I query an XDocument with a 'path'?

Even though this is a somewhat older post, it should be noted that LINQ-to-XML can be used as an alternative to System.XML.XPath to find elements based on a path within an XDocument

Example:

var results = x.Elements("path").Elements("to").Elements("element").Elements("I").Elements("want").FirstOrDefault();

Note: The LINQ to XML command may need to be altered to accommodate for the actual structure and/or cardinality of the XML.

https://msdn.microsoft.com/en-us/library/bb675156.aspx

You can use methods from System.Xml.XPath.Extensions to do this.

For example, if you want to select a single element, you would use XPathSelectElement():

var element = doc.XPathSelectElement("/path/to/element/I/want");

The queries don't have to be simple paths like what you described, they use the XPath language.