Remove specific nodes under the XML root?

Question

My XML is below;

<XML ID="Microsoft Search Thesaurus">
 <thesaurus xmlns="x-schema:tsSchema.xml">
   <diacritics_sensitive>1</diacritics_sensitive>
   <expansion>
     <sub>Internet Explorer</sub>
     <sub>IE</sub>
     <sub>IE5</sub>
   </expansion>
   <expansion>
     <sub>run</sub>
     <sub>jog</sub>
   </expansion>
 </thesaurus>
</XML>

I want to remove the "expansion" nodes from the XML. After removing process, it would be like that;

<XML ID="Microsoft Search Thesaurus">
 <thesaurus xmlns="x-schema:tsSchema.xml">

 </thesaurus>
</XML>

My code is below;

XDocument tseng = XDocument.Load("C:\\tseng.xml");
XElement root = tseng.Element("XML").Element("thesaurus");
root.Remove();
tseng.Save("C:\\tseng.xml");

I got an error "Object reference not set to an instance of an object." for line "root.Remove()". How can I remove the "expansion" nodes from XML file? Thanks.

Answer 1

Use:

Will remove only expansion elements:

XNamespace ns = "x-schema:tsSchema.xml";
tseng.Root.Element(ns + "thesaurus")
    .Elements(ns + "expansion").Remove();

---

Will remove all children of thesaurus:

XNamespace ns = "x-schema:tsSchema.xml";
tseng.Root.Element(ns + "thesaurus").Elements().Remove();