XML documents are implemented with the XDocument class.
using System; using System.Linq; using System.Xml.Linq; using System.Collections.Generic; class Program//from w ww . ja v a 2 s. c om { static void Main(string[] args){ XDocument xDocument = new XDocument(); Console.WriteLine(xDocument); xDocument = new XDocument( new XDeclaration("1.0", "UTF-8", "yes"), new XDocumentType("Books", null, "Books.dtd", null), new XProcessingInstruction("BookCataloger", "out-of-print"), new XElement("Books")); Console.WriteLine(xDocument); } }
The document's ToString method omits the declaration from its output.
If you debug the code and examine the document, you will see that the declaration is there.