How-To write XML "plain" document, without namespaces and header

Here the XmlTextWriterFormattedNoDeclaration class definition:

public class XmlTextWriterFormattedNoDeclaration : System.Xml.XmlTextWriter
{
      public XmlTextWriterFormattedNoDeclaration(System.IO.TextWriter w) : base(w)
      {
            //Formatting = System.Xml.Formatting.Indented;
      }
  
      public override void WriteStartDocument()
      {
            // suppress
      }
}

And here, how we can use it:

// Create an instance for namespace class
XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
ns.Add("", "");
 
// now, serialize the object
XmlSerializer xmlr = new XmlSerializer(typeof(Docs));
StringWriter sw = new StringWriter();
XmlTextWriter tw = new XmlTextWriterFormattedNoDeclaration(sw);
 
xmlr.Serialize(tw, docs, ns);
  
MessageBox.Show(sw.ToString());

For deserialization we have:

// Deserializing the object
StringReader sr = new StringReader(sw.ToString());
Docs docs2 = (Docs) xmlr.Deserialize(sr);
 
MessageBox.Show(docs2.ToString());