How to create this with XmlTextWriter

Is this even possible using XmlTextWriter? Or would I need to use an
XmlDocument?
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I need to create the following XML:
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<?xml version="1.0"?>
<AccessRequest xml:lang="en-US">
<AccessLicenseNumber>YOURACCESSLICENSENUMBER</AccessLicenseNumber>
<UserId>YOURUSERID</UserId>
<Password>YOURPASSWORD</Password>
</AccessRequest>
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When I use the XmlTextWriter, I always get this as the first line:
<?xml version="1.0" encoding="utf-16"?>
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I also need help adding the: xml:lang="en-US" to the AccessRequest
element.
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Thanks a bunch!
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Actually, I figured out how to do the xml:lang attribute. Now how do I get
rid of the encoding attribute in the first line?