什么是此XPath的LINQ to XML等价物

  <book>
   <title>Book 1</title>
   <author>Author 1</author>
  </book>
  <book>
   <title>Book 2</title>
   <author>Author 2</author>
  </book>
</books>

XDocument doc = XDocument.Load("books.xml");
var books = from book in doc.Descendants("book")
            select book;

/books/book

XDocument doc = XDocument.Load("books.xml");
var books = from book in doc.Descendants("book")
            select book;