private void metroButton_envoyer_Click(object sender, EventArgs e) { ArrayList t = new ArrayList(); t = Class_Database_app.get_ALL_emails(); //foreach (string v in t) // MessageBox.Show(v); try { foreach (String x in t) { MailMessage mail = new MailMessage(); mail.To.Add(x); mail.Subject = metroTextBox_objet.Text; mail.From = new MailAddress("*****@*****.**"); mail.Body = richTextBox_message.Text; SmtpClient smtp = new SmtpClient(); smtp.Host = "smtp.gmail.com"; smtp.Port = 587; smtp.Credentials = new System.Net.NetworkCredential("*****@*****.**", "Global16"); smtp.EnableSsl = true; smtp.Send(mail); } MessageBox.Show("Votre message à ete envoyer", "Envoyer", MessageBoxButtons.OK, MessageBoxIcon.Information); } catch (Exception ep) { MessageBox.Show(ep.ToString()); } }