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Failed to open PDF file- sent as an email attachement

Dear team,

I have the error message as open pdf from email attachment. "Adobe Reader could not open 'filename.pdf' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment amd was not correctly decoded"

My codes as below

byte[] content = Encoding.ASCII.GetBytes("


MemoryStream stream = new MemoryStream(content);

MemoryStream outStream = new MemoryStream();

var pdf = new Aspose.Pdf.Pdf();



System.Net.Mail.MailMessage mailMessage = new MailMessage("fromemail@yahoo.com", "toEmail@yahoo.com");

mailMessage.Attachments.Add(new Attachment(outStream, "test.pdf"));
System.Net.Mail.SmtpClient client = new SmtpClient();
mailMessage.Body = "test";
mailMessage.Subject = "test";

How can I send email with pdf attachemnt?. I would not save pdf file to the file system before sending as attachment email.