How to: Programmatically Remove All Comments from Documents
Use the DeleteAllComments method to remove all comments from a Microsoft Office Word document.
Applies to: The information in this topic applies to document-level projects and application-level projects for Word 2013 and Word 2010. For more information, see Features Available by Office Application and Project Type.
To remove all comments from a document that is part of a document-level customization
Call the DeleteAllComments method of the ThisDocument class in your project. To use this code example, run it from the ThisDocument class.