private void send_Click(object sender, EventArgs e) { if (To.SelectedItem == null) { return; } if (From.SelectedItem == null) { return; } m.Reset(); m.msg = msg.Text; m.subject = sub.Text; m.to = new System.Net.Mail.MailAddress(((MailCount)To.SelectedItem).user); foreach (var f in files.Items) { m.AddFile((string)f); } m.send(); }