Sending mail with attachments programmatically in ASP.NET

Question

I am dynamically generating a number of different types of files based upon a GridView in ASP.NET - an Excel spreadsheet and a HTML file. I am doing so using this code (this is

Answer 1

    protected void btnSend_OnClick(object sender, EventArgs e)
    {
        MailMessage mail = new MailMessage();
        byte[] data = new byte[1024];
        MemoryStream stream = new MemoryStream(data);
        Attachment attach = new Attachment(stream, "Attachment file name");
        mail.Attachments.Add(attach);
        new SmtpClient().Send(mail);
    }