Let’s Web developer has to develop a page where the user submits a file containing the ISBN of all the books he/she needs information about. The user has to retrieve these books and create an XML file with the book title, author and price.Web developer can use a LINQ query to pass child elements and nest data, by exploiting a possibility to pass a list of elements to the XElement constructor. The following C# code lines show this approach:
var books = BooksFromAQuery(); var book =    new XDocument(    new XElement(“Books”,       from b in books       select new XElement(“Book”,          new XElement(“ISBN”, b.ISBN),          new XElement(“Title”, b.Title),          new XElement(“Author”, b.Author),          new XElement(“Price”, b.Price       )    ) );