static void Main(string[] args) { Amplifier amplifier = new Amplifier(); amplifier.Volume = 1; int check = 1; while (check != 0) { Console.Write("Give a volume (0-100) > "); string line = Console.ReadLine(); amplifier.Volume = int.Parse(line); check = int.Parse(line); Console.WriteLine(" --> Volume set to : " + amplifier.Volume); Console.WriteLine(); } }