class Program
    {
        static void Main(string[] args)
        {
            string fileName = "OpenXML.docx";
            GetCommentsFromDocument(fileName);
        }
        public static void GetCommentsFromDocument(string fileName)
        {
            using (WordprocessingDocument wordDoc =
                WordprocessingDocument.Open(fileName, false))
            {
                WordprocessingCommentsPart commentsPart =
                    wordDoc.MainDocumentPart.WordprocessingCommentsPart;

                if (commentsPart != null && commentsPart.Comments != null)
                {
                    foreach (Comment comment in commentsPart.Comments.Elements())
                    {
                        Console.WriteLine(comment.InnerText);
                        
                    }
                }
            }
            Console.ReadLine();
        }
    }

class Program
    {
        static void Main(string[] args)
        {
            string fileName = "OpenXML.docx";
            GetCommentsFromDocument(fileName);
        }
        public static void GetCommentsFromDocument(string fileName)
        {
            Document document = new Document();
            document.LoadFromFile(fileName);
            foreach (Comment comment in document.Comments)
            {
                foreach (Paragraph para in comment.Body.Paragraphs)
                {
                    Console.WriteLine(para.Text);
                }
                
            }
            Console.ReadLine();
        }
    }