Opmerkingen en auteurs van opmerkingen verwijderen uit PPTX in C#

using (Presentation presentation = new Presentation("example.pptx"))
{
    // Deletes all comments from the presentation
    foreach (var author in presentation.CommentAuthors)
    {
        author.Comments.Clear();
    }

    // Deletes all authors
    presentation.CommentAuthors.Clear();

    presentation.Save("example_out.pptx", SaveFormat.Pptx);
}