I've read and understand this and this Stackoverflow question but there all about OpenXML SDK 2.0. In OpenXML SDK 2.0 there is no real way to update the Table of Content (ToC). There are a few workarounds like marking the document dirty which will ask the user to update the ToC on opening the document, update the ToC using office automation or update the ToC using a word macro.
Unfortunately, none of this solutions fits for my problem.
Is there an more convenient way to update the ToC using Open XML SDK 2.5?