private async Task BeepAsync(int frequency)
        {
            await Task.Run(() => { Console.Beep(frequency, 100); });
        }
        private async Task PlayMelody(string melody, int timeout)
        {
            for (int i = 0; i < melody.Length; i++)
            {
                switch (melody[i])
                {
                    case 'A':
                        await BeepAsync((int)Frequencies.A);
                        break;
                    case 'B':
                        await BeepAsync((int)Frequencies.B);
                        break;
                    case 'C':
                        await BeepAsync((int)Frequencies.C);
                        break;
                    case 'D':
                        await BeepAsync((int)Frequencies.D);
                        break;
                    case 'E':
                        await BeepAsync((int)Frequencies.E);
                        break;
                    case 'F':
                        await BeepAsync((int)Frequencies.F);
                        break;
                    case 'G':
                        await BeepAsync((int)Frequencies.G);
                        break;
                    default:
                        break;
                }
                await Task.Delay(100);
            }
        }