How could I find specific attribute in XML file multiple time?

I have an XML document :


<Results>
  <ResultSet>"nothing special" Description="More of nothing" type="system"
    <Results1>
      <time>
        <Body>type="system" datatype="int"</Body>
        <att2>type="session" datatype="float"</att2>
      </Result>
      <Result>
        <ID>type="system" datatype="int"</ID>
        <Stuff>type="session" datatype="float"</Stuff>
      </Result>
      <Result>
        <att1>type="system" datatype="int"</att1>
        <att2>type="session" datatype="int"</att2>
      </Result>
    </Results1>
    <Results2>
      <time>
        <att1>type="session" datatype="int"</att1>
        <att2>type="system" datatype="float"</att2>
      </Result>
      <Result>
        <ID>type="system" datatype="float"</ID>
      </Result>
    </Results2>
  </ResultSet>
</Results>

I would like to get the path for each type = "session" in the document in a list using C#. For the moment, I have a function to get the path getPath. But I have absolutely no idea about how to search in ALL the XML no matter the node.

I'm using LINQ to XML and this is what I have for the moment :


    List<string> pathList = new List<string>(); 
    IEnumerable<XElement> path =
        from element in doc.Elements(/*I don't know*/)
        where (string)element.Attribute("type") == "session"
        select element;

    foreach (XElement element in path){
        pathList.Add(getPath(element));

    }

How could I find specific attribute in XML file multiple time?

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