Using LINQ to XML to match deeper descendant elements?

Suppose I have the following XML file:

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <project>
    <ixGroup>105</ixGroup>
    <sGroup>Place Group</sGroup>
  </project>
  <project>
    ...

And I use the following code to extract the distinct <ixGroup> and <sGroup> text values from it:

XDocument doc = XDocument.Load(@"C:\temp\xmlParse2.xml");

var projects = (from project in doc.Descendants("project")
                select new {
                    id = project.Element("ixGroup").Value,
                    name = project.Element("sGroup").Value
                }).Distinct();

foreach(var project in projects)
{
    project.id.Dump("id");
    project.name.Dump("name");
}

If the same xml file had an extra element like the <projects> one added below:

<response>
  <projects>
    <project>
      <ixGroup>105</ixGroup>
      <sGroup>Place Group</sGroup>
    </project>
    <project>开发者_Go百科
      ...

How would I modify the LINQ code above to still access the <project> elements?

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You wouldn't have to. I've just tested it, and your current LINQ statement will still return all the <project> elements regardless of whether they're nested within a <projects> element.

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You don't need to modify your code at all. The Descendants method will search as far down the tree as it needs to in order to find matching elements, which can be both a curse and a blessing. In your case, the code as written will continue to work even if you add an intermediate <projects> node.

(The method that only searches for direct child methods is Children().

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Elements only searches child nodes, but Descendants goes all the way down the tree. In other words, you won't have to do anything.