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() { XDocument xDocument = new XDocument(new XElement("BookParticipant")); XDeclaration xDeclaration = new XDeclaration("1.0", "UTF-8", "yes"); xDocument.Declaration = xDeclaration; Console.WriteLine(xDocument); } }