保存从模板生成的OpenXML文档(Word)。

I have a bit of code that will open a Word 2007 (docx) document and update the appropriate CustomXmlPart (thus updating the Content Controls in the document itself as they are mapped to the CustomXmlPart) but can't work out how to save this as a new file.! Surely it can't be that hard!I have a bit of code that will open a Word 2007