The best replacement for xmlwriter is xmltextwriter.

The best alternatives to xmlwriter are rated as following:
★★★★★  xmltextwriter
★★★★  xmldocument
★★★  xmldictionarywriter
★★★  xmlserializer
★★  streamwriter
★  textwriter
★  xelement

Your alternative for xmlwriter is not listed? Suggest!
Speaking about xmlwriter, one probably shouldn't forget about memorystream.

Other search terms related to xmlwriter and their ratings are:
★★★★★ memorystream
You have in mind a companion for xmlwriter and it is not yet here? Propose!



Google Trends

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xmlwriter
xmltextwriter
xmldocument