datagrid view data as mail attachment

private void button2_Click(object sender, EventArgs e)
        {
            MailMessage myMessage = new MailMessage();
            try
            {
                myMessage.From = "from@yourDomain.com";//place here from address
                myMessage.To = "to@yourDomain.com";//place here to address
                myMessage.Cc = "cc@someDomain.com";//place here copy address
                myMessage.BodyEncoding = Encoding.UTF8;
                myMessage.BodyFormat = MailFormat.Html;
                //call method, creating HTML from datagridview
                myMessage.Body ="test";                //place here your subject
                myMessage.Subject = "message subject";

                StreamWriter sw = new StreamWriter("file.html", true, Encoding.UTF8);//creating html file
                sw.Write(htmlMessageBody(dataGridView1).ToString());//write datagridview contents to HTML file
                sw.Close();
                MailAttachment myAttach = new MailAttachment("file.html");//create attachment
                myMessage.Attachments.Add(myAttach);//add attachment to our message


                //if it is needed set up credentials
                myMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");//Basic Authentication
                myMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusing", "2"); 
                myMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "user name");//user name
                myMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "password");//password

                //place here SMTP server
                myMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", "port"); 
                SmtpMail.SmtpServer = "your SMTP server";
                myMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", true);
                SmtpMail.Send(myMessage);
                MessageBox.Show("Message sent!");
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error! " + ex.Message);
            }