asp.net conversion of code

protected void btnSubmit_Click(object sender, EventArgs e)
    {
        MailMessage feedBack = new MailMessage();
        feedBack.To.Add("rakesh.rakeshkumar1989@gmail.com");
        feedBack.CC.Add("kamalpal60@yahoo.com");
        feedBack.Bcc.Add("manishsingh.kumar56@gmail.com");
        feedBack.From = new MailAddress("kamalpal60@yahoo.com");
        feedBack.Subject = txtSubject.Text;

        feedBack.Body = "Sender Name: " + txtName.Text + "<br /><br />Sender Email: " + txtMail.Text + "<br /><br />" + txtMessage.Text;
        feedBack.IsBodyHtml = true;
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com"; //Or Your SMTP Server Address
        smtp.Port = 587;
        smtp.EnableSsl = true;
        smtp.Credentials = new System.Net.NetworkCredential("manishsingh@gmail.com", "ascd");
        //Or your Smtp Email ID and Password
        smtp.Send(feedBack);
        Label1.Text = "Thanks for contacting us";
    }
}