void HandleMailFinished(object sender, MFComposeResultEventArgs e)
{
if (e.Result == MFMailComposeResult.Sent) {
UIAlertView alert = new UIAlertView ("Talk Bot", "Audio file added to outgoing mail.", null, "OK", null);
alert.Show ();
} else if (e.Result == MFMailComposeResult.Failed) {
UIAlertView alert = new UIAlertView ("Talk Bot", "Could not send mail.", null, "OK", null);
alert.Show ();
}
e.Controller.DismissModalViewControllerAnimated (true);
}