public class Program {
    static void Main(string[] args) {
        if (args.Length == 0) {
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine("Please specify an option.");
            Console.ResetColor();
        } else {
            switch(args[0]) {
                case "":
                    break;
                default:
                    break;
            }
        }
    }
}