Csharp/C Sharp by API/System.Xml.Linq/XDeclaration

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new XDeclaration("1.0", "UTF-8", "yes")

<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {

   public static void Main() {
       XElement firstParticipant;
       XDocument xDocument =  new XDocument(new XDeclaration("1.0", "UTF-8", "yes"),
         new XDocumentType("Books", null, "Books.dtd", null),
         new XProcessingInstruction("Book", "out-of-print"),
       new XElement("Books", firstParticipant =
         new XElement("Book",
       new XComment("a new author."),
       new XProcessingInstruction("AuthorHandler", "new"),
       new XAttribute("type", "Author"),
       new XElement("FirstName", "A"),
       new XElement("LastName", "B")),
       new XElement("Book",
       new XAttribute("type", "Author"),
       new XElement("FirstName", "C"),
       new XElement("LastName", "D"))));
       foreach (XNode node in firstParticipant.Nodes().OfType<XElement>()) {
           Console.WriteLine(node);
       }
   }

}

 </source>