private void Form1_Load(object sender, System.EventArgs e)
{
  StringWriter stringWriter = new StringWriter();
  XmlTextWriter xmlWriter = new XmlTextWriter(stringWriter);
  try
  {
    xmlWriter.WriteStartDocument();
    xmlWriter.WriteStartElement("a");

    xmlWriter.WriteStartAttribute("attr1","");
    xmlWriter.WriteString("sample1");
    xmlWriter.WriteEndAttribute();

    xmlWriter.WriteAttributeString("attr2","","sample2");

    xmlWriter.WriteStartElement("b");
    xmlWriter.WriteEndElement();

    xmlWriter.WriteString("\r\n");

    xmlWriter.WriteStartElement("c");
    xmlWriter.WriteString("sample3");
    xmlWriter.WriteEndElement();

    xmlWriter.WriteElementString("d","sample4");

    xmlWriter.WriteEndElement();

    xmlWriter.WriteWhitespace("\r\n");
    xmlWriter.WriteComment("end of document");

    xmlWriter.WriteEndDocument();
  }
  finally
  {
    xmlWriter.Close();
  }
  Trace.Write( stringWriter.ToString() );
}