//引入命名空间
using System;
using System.IO;
using System.Xml;

public class Sample
{
  private const string filename = "sampledata.xml";

  public static void Main()
  {
     XmlTextWriter writer = null;

     writer = new XmlTextWriter (filename, null);
     //Use indenting for readability.
     writer.Formatting = Formatting.Indented;

     //Write the XML delcaration. 
     writer.WriteStartDocument();

     //Write the ProcessingInstruction node.
     String PItext="type='text/xsl' href='book.xsl'";
     writer.WriteProcessingInstruction("xml-stylesheet", PItext);

     //Write the DocumentType node.
     writer.WriteDocType("book", null , null, "<!ENTITY h 'hardcover'>");
        
     //Write a Comment node.
     writer.WriteComment("sample XML");
    
     //Write a root element.
     writer.WriteStartElement("book");

     //Write the genre attribute.
     writer.WriteAttributeString("genre", "novel");
    
     //Write the ISBN attribute.
     writer.WriteAttributeString("ISBN", "1-8630-014");

     //Write the title.
     writer.WriteElementString("title", "The Handmaid's Tale");
              
     //Write the style element.
     writer.WriteStartElement("style");
     writer.WriteEntityRef("h");
     writer.WriteEndElement(); 

     //Write the price.
     writer.WriteElementString("price", "19.95");

     //Write CDATA.
     writer.WriteCData("Prices 15% off!!");

     //Write the close tag for the root element.
     writer.WriteEndElement();
             
     writer.WriteEndDocument();

     //Write the XML to file and close the writer.
     writer.Flush();
     writer.Close();  

     //Load the file into an XmlDocument to ensure well formed XML.
     XmlDocument doc = new XmlDocument();
     //Preserve white space for readability.
     doc.PreserveWhitespace = true;
     //Load the file.
     doc.Load(filename);  
    
     //Display the XML content to the console.
     Console.Write(doc.InnerXml);  
  }
}

//引入命名空间
using System;
using System.IO;
using System.Text;
using System.Xml;

public class WriteXml {
  public static void Main(string [] args) {
    XmlTextWriter writer = new XmlTextWriter(Console.Out);
    writer.Formatting = Formatting.Indented;
    writer.WriteStartDocument(true);
    writer.WriteComment("this is a comment");
    writer.WriteStartElement("root");

    writer.WriteAttributeString("id","1");
    writer.WriteStartAttribute("mynamespace", "name", "foo");
    writer.WriteString("bar");
    writer.WriteEndAttribute();

    // Write another element
    writer.WriteElementString("element1","some characters");

    writer.WriteStartElement("cdataElement");
    writer.WriteAttributeString("date",DateTime.Now.ToString());
    writer.WriteCData("< & would choke on");
    writer.WriteString("< & & & ");
    writer.WriteEndElement();

    // Write an empty element
    writer.WriteStartElement("emptyElement");
    writer.WriteEndElement();

    // Write another empty element
    writer.WriteStartElement("emptyElement","Empty");
    writer.WriteFullEndElement();

    // Write some text
    writer.WriteString("One string ");
    writer.WriteEntityRef("amp");
    writer.WriteString(" another.");

    // Close the root element
    writer.WriteEndElement();
    // End the document
    writer.WriteEndDocument();

    writer.Flush();
    writer.Close();
  }
}