Imap c#как можно скачать письмо только с файлами

foreach (var attachment in item.Attachments)
                {

                    var entity = client.Inbox.GetBodyPart(item.UniqueId, attachment);

                    Console.WriteLine(entity.ContentType.Name);
                   
                    var part = (MimePart)entity;

                    var fileName = part.FileName;

                    var path = Path.Combine(directory, fileName);


                    
                    using (var stream = File.Create(path))
                        part.Content.DecodeTo(stream);

                }