从Xamarin应用程序发送带有直接附件的电子邮件

Question

我想将文件附加到我的电子邮件中，但我没有选择特定文件，现在我必须预先设置要发送的文件，当然，现在我希望用户从中选择任何类型的文件他的手机或内存，它返回文件的路径，可以是照片，视频或文件

        SmtpClient client = new SmtpClient();
        client.Host = "smtp.gmail.com";
        client.EnableSsl = true;
        client.Credentials = new System.Net.NetworkCredential("email2", "senha");
        MailMessage mail = new MailMessage();
        mail.Sender = new System.Net.Mail.MailAddress("email2");
        mail.From = new MailAddress("email2");
        mail.To.Add(new MailAddress("email1"));
        mail.Subject = "Desembucha Aplicativo";
        mail.Body = " Mensagem do Aplicativo<br/> Nome:  " + nome.Text + "<br/> Email : " + email.Text + " <br/> Mensagem : " + mensagem.Text;
        mail.IsBodyHtml = true;
        mail.Priority = MailPriority.High;

        Attachment anexado = new Attachment(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal) + @"/arquivo.txt", MediaTypeNames.Application.Octet);
        mail.Attachments.Add(anexado);

        try
        {
            client.Send(mail);
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            AlertDialog alerta = builder.Create();
            alerta.SetCancelable(true);
            alerta.SetTitle("Mensagem enviada com sucesso");
            alerta.SetMessage("Aguarde em breve daremos retorno de sua mensagem, Obrigado");
            alerta.SetButton("OK", (s, ev) =>
            {
                Finish();
            });
            alerta.Show();
        }
        catch
        {
            Toast.MakeText(this, "Error", ToastLength.Short).Show();
        }
        finally
        {
            mail = null;
        }