XMLTextWriter: closing a starting element tag

[Andrew R. Thomas-Cramer]

I'm using XMLTextWriter to write to a socket stream. I need to write the
opening root tag immediately for receipt by the client; elements beneath
it will come later.

m_writer.WriteStartDocument();
m_writer.WriteStartElement( "stream", "stream", "mynamespace" );
m_writer.Flush();

What I want is this:

<?xml version="1.0"?><stream:stream xmlns:stream="mynamespace">

But what I get is this:

<?xml version="1.0"?><stream:stream

XMLTextWriter seems to delay closing the starting element tag until it's
sure no further element attributes will be added. Is there any way I can
force it to close the starting element tag?