InspectionPackage

public PresentationInspectionPackage InspectionPackage { get; }

using (Metadata metadata = new Metadata(Constants.InputPpt))
{
     var root = metadata.GetRootPackage<PresentationRootPackage>();

     if (root.InspectionPackage.Comments != null)
     {
         foreach (var comment in root.InspectionPackage.Comments)
         {
             Console.WriteLine(comment.Author);
             Console.WriteLine(comment.Text);
             Console.WriteLine(comment.CreatedTime);
             Console.WriteLine(comment.SlideNumber);
         }
     }

     if (root.InspectionPackage.HiddenSlides != null)
     {
         foreach (var slide in root.InspectionPackage.HiddenSlides)
         {
             Console.WriteLine(slide.Name);
             Console.WriteLine(slide.Number);
             Console.WriteLine(slide.SlideId);
         }
     }
}