private static void DownLoadMailAttachments(ExchangeService service, ItemId itemId)

        {

            EmailMessage message = EmailMessage.Bind(service, itemId, new PropertySet(BasePropertySet.FirstClassProperties, ItemSchema.Attachments)); ;

            if (message.HasAttachments)

            {

                foreach (MailAttachment attachment in message.Attachments)

                {

                    FileAttachment fileAttachment = attachment as FileAttachment;

                    ItemAttachment itemAttachment = attachment as ItemAttachment;

                    if (itemAttachment != null)

                    {

                        itemAttachment.Load(EmailMessageSchema.MimeContent);

                        char[] invalidChars = Path.GetInvalidPathChars();

                        string name = itemAttachment.Name;

                        foreach (char invalidChar in invalidChars)

                        {

                            name = name.Replace(invalidChar, ' ');

                        }

                        name = name.Replace(":", " ");

                        string emailPath = Path.Combine(Path.GetTempPath(), name + ".eml");

                        using (FileStream stream = File.Open(emailPath, FileMode.Create, FileAccess.ReadWrite))

                        {

                            foreach (byte content in itemAttachment.Item.MimeContent.Content)

                            {

                                stream.WriteByte(content);

                            }

                        }

                    }

                    if (fileAttachment != null)

                    {

                        string filePath = Path.Combine(Path.GetTempPath(), fileAttachment.Name);

                        fileAttachment.Load();

                        using (FileStream stream = File.Open(filePath, FileMode.Create, FileAccess.ReadWrite))

                        {

                            foreach (byte content in fileAttachment.Content)

                            {

                                stream.WriteByte(content);

                            }

                        }

                    }

                }

            }

        }