LINQ To Xml:按条件删除element

XDocument xDocument = new XDocument( 
  new XElement("BookParticipants", 
    new XElement("BookParticipant",  
      new XAttribute("type", "Author"), 
      new XElement("FirstName", "Joe"), 
      new XElement("LastName", "Rattz")), 
    new XElement("BookParticipant",  
      new XAttribute("type", "Editor"), 
      new XElement("FirstName", "Ewan"), 
      new XElement("LastName", "Buckingham")))); 
 
xDocument.Descendants().Where(e => e.Name == "FirstName").Remove(); 
 
Console.WriteLine(xDocument); 

输出

<BookParticipants> 
  <BookParticipant type="Author"> 
    <LastName>Rattz</LastName> 
  </BookParticipant> 
  <BookParticipant type="Editor"> 
    <LastName>Buckingham</LastName> 
  </BookParticipant> 
</BookParticipants>