Deveel.Readline.MoveUp C# (CSharp) Méthode

        private static void MoveUp()
        {
            if (historyPosn == -1) {
                if (History.Count > 0) {
                    historySave = new String(buffer, 0, length);
                    historyPosn = 0;
                    SetCurrent(History.GetHistory(historyPosn));
                }
            } else if ((historyPosn + 1) < History.Count) {
                ++historyPosn;
                SetCurrent(History.GetHistory(historyPosn));
            } else {
                Console.Beep();
            }
        }