AutoClosingMessageBox(string caption, int timeout, Func <string, MessageBoxButtons, DialogResult> showMethod,
MessageBoxButtons buttons = MessageBoxButtons.OK, DialogResult defaultResult = DialogResult.None)
{
this.caption = caption ?? string.Empty;
this.result = buttons.ToDialogResult(defaultResult);
using (new Threading.Timer(OnTimerElapsed, result.ToDialogButtonId(buttons), timeout, Timeout.Infinite))
this.result = showMethod(this.caption, buttons);
}