Get a XElement at a given path
You could try the following which utilizes XPath's XPathSelectElement extension method.

test.xml

&lt;Root&gt;
  &lt;Foo&gt;
      &lt;FooBar&gt;1&lt;/FooBar&gt;
    &lt;Bar&gt;
      &lt;FooBar&gt;2&lt;/FooBar&gt;
    &lt;/Bar&gt;
  &lt;/Foo&gt;
&lt;/Root&gt;


C#

using System;
using System.Xml.Linq;
using System.Xml.XPath;

...

    static void Main(string[] args)
    {
        XDocument document = XDocument.Load(@"test.xml");
        XElement element = ElementAtPath(document.Root, "Foo/Bar/FooBar");

        Console.WriteLine(element); // Prints &lt;FooBar&gt;2&lt;/FooBar&gt;
    }

    private static XElement ElementAtPath(XElement root, string path)
    {
        if (root == null)
        {
            throw new ArgumentNullException(nameof(root));
        }

        if (string.IsNullOrWhiteSpace(path))
        {
            throw new ArgumentException("Invalid path.");
        }

        return root.XPathSelectElement(path);
    }