使用LINQ to XML匹配更深的后代元素？

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

<ixGroup>

<sGroup>

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\");
}

<projects>

<response>
  <projects>
    <project>
      <ixGroup>105</ixGroup>
      <sGroup>Place Group</sGroup>
    </project>
    <project>
      ...

<project>