public void SendInstance(EmailSchedule emailSchedule)
        {
            var message = new MailMessage();

            MemoryStream attachmentStream = null;
            try
            {
                var mailAddress =
                    new MailAddress(string.IsNullOrEmpty(emailSchedule.EmailAddressFrom)
                        ? ConfigurationManager.AppSettings["DefaultSender"]
                        : emailSchedule.EmailAddressFrom
                        , emailSchedule.FromField);
                message.From = mailAddress;
                message.Sender = mailAddress;

                if (!String.IsNullOrEmpty(emailSchedule.ReplyEmailAddress))
                {
                    mailAddress = new MailAddress(emailSchedule.ReplyEmailAddress, emailSchedule.FromField);
                    message.ReplyToList.Add(mailAddress);
                }
                string[] emailAdressesToList = emailSchedule.EmailAddressTo.Split(',');
                foreach (var item in emailAdressesToList)
                {
                    if (!string.IsNullOrEmpty(item))
                    {
                        message.To.Add(new MailAddress(item));
                    }
                }
                message.Subject = emailSchedule.Subject;
                message.Body = emailSchedule.EmailBody;
                message.BodyEncoding = Encoding.UTF8;
                message.IsBodyHtml = true;
                if (emailSchedule.AttachmentContent != null && emailSchedule.AttachmentContent.Length > 0)
                {
                    // Create a memory stream
                    attachmentStream = new MemoryStream();
                    {
                        attachmentStream.Write(emailSchedule.AttachmentContent, 0, emailSchedule.AttachmentContent.Length);

                        // Set the position to the beginning of the stream.
                        attachmentStream.Seek(0, SeekOrigin.Begin);

                        // Create attachment
                        ContentType contentType = new ContentType();
                        contentType.MediaType = emailSchedule.AttachmentMediaType; // MediaTypeNames.Application.Octet;

                        if (contentType.MediaType == "application/zip")
                        {
                        }
                        contentType.Name = emailSchedule.AttachmentName;
                        Attachment attachment = new Attachment(attachmentStream, contentType);

                        // Add the attachment
                        message.Attachments.Add(attachment);
                    }
                }
                message.Send(emailSchedule);
            }
            catch (Exception ex)
            {
                emailSchedule.EmailSentStatusValue = (short) EmailSentStatusEnumerator.Failed;
                TimerLog.LogEntry(ex.Message, EventLogEntryType.Error);
            }
            finally
            {
                if (attachmentStream != null)
                {
                    attachmentStream.Dispose();
                }
            }
        }