C# code to send email

Form.cs

private void button1_Click(object sender, EventArgs e)
        {
            System.Net.Mail.MailMessage mailMessage = new System.Net.Mail.MailMessage();
            try
            {
                mailMessage.From = new System.Net.Mail.MailAddress("me@help.com", "me@Sender.com");
                mailMessage.To.Add("my-email");
                mailMessage.Subject = "Hullo";
                mailMessage.Body = "This is a test";
                mailMessage.IsBodyHtml = true;
                System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient("my-smtp-server");

                //Specifies how email messages are delivered. Here Email is sent through the network to an SMTP server.
                smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;

                // Need auth. ?
                string loginName = "user";
                string loginPassword = "password";
                //string domain = "my-domain";

                //System.Net.NetworkCredential networkCredential = new System.Net.NetworkCredential((loginName, loginPassword, domain);
                System.Net.NetworkCredential networkCredential = new System.Net.NetworkCredential(loginName, loginPassword);
                smtpClient.UseDefaultCredentials = false;
                smtpClient.Credentials = networkCredential;

                smtpClient.Send(mailMessage);

                mailMessage.Dispose();
                smtpClient = null;
            }

            catch (Exception ex)
            {
                throw ex;
            }

            finally
            {
                mailMessage.Dispose();
            }
            
        }

http://nzpcmad.blogspot.co.nz/2017/04/c-sending-email.html