public static void Main()
    {
        NumberGame myNumber = new NumberGame();

        Console.WriteLine("Would you like to play the higher/lower game? (Y/N)");
        if (Console.ReadLine() == "y")
        {
            Console.WriteLine("Would you like the computer to guess your number (Mode A) or would you like to guess it's number (Mode B)? (A/B)");
            if (Console.ReadLine() == "a")
            {
                myNumber.UserNumberFinder(); //Mode A - Computer predicts the user's number.
            }
            else
            {
                myNumber.ComputerNumberFinder(); //Mode B - User predict the computer's number.
            }
        }
        else
        {
            Console.WriteLine("Goodbye!");
            System.Environment.Exit(0);
        }
    }