LINQ Order By Query for XML

Hi I have the following problem:

I am trying to do the following on an XML file: sort all STRUCTs according to the ID attribute of STRING. But return a list of CONTENT objects. The XML can contain more than one element.

<OBJECT>
  <CONTENT>
     <STRUCT>
        <STRING ID="2">string</STRING>
     </STRUCT>
     <STRUCT>
        <STRING ID="1">string1</STRING>
     </STRUCT>
   </CONTENT>
</OBJECT>
<OBJECT>
  <CONTENT>
     <STRUCT>
        <STRING ID="345">string</STRING>
     </STRUCT>
     <STRUCT>
        <STRING ID="333">string</STRING>
     </STRUCT>
   </CONTENT>
</OBJECT>

I am using the following LINQ query, but the strings are not being sorted:

Dim Contents = From nm In origXML.Descendants("CONTENT")
    Let ID = nm.Element("STRUCT").Element("STRING").Attribute("ID")
    Order By ID Ascending
    Select nm

For Each xmlString In Contents....

Desired output

<OBJECT>
  <CONTENT>
     <STRUCT>
        <STRING ID="1">string</STRING>
     </STRUCT>
     <STRUCT>
        <STRING ID="2">string1</STRING>
     </STRUCT>
   </CONTENT>
</OBJECT>
<OBJECT>
  <CONTENT>
     <STRUCT>
        <STRING ID="333">string</STRING>
     </STRUCT>
     <STRUCT>
        <STRING ID="345">string</STRING>
     </STRUCT>
   </CONTENT>
</OBJECT>

I know there must be other ways to do this, but I want to know if it's possible using LINQ?

Thanks

Rob