public static void Main(string[] args)
        {
            Console.ForegroundColor = ConsoleColor.Yellow;

            Console.WriteLine("BNU CO453 Applications Programming 2020-2021!");
            Console.WriteLine();
            string choice = Console.ReadLine();

            string[] choices = { " Distance Converter ", " BMI Calculator ", "Students Grades", " Social Network " };

            int choiceNo = ConsoleHelper.SelectChoice(choices);

            if (choiceNo == 1)
            {
                converter.ConvertDistance();
            }
            if (choiceNo == 2)
            {
                Calculator.OutputUnits();
            }
            if (choiceNo == 3)
            {
                calculator.CalculateMark();
            }
            if (choiceNo == 4)
            {
                app04.DisplayMenu();
            }
            else
            {
                Console.WriteLine("Invalid Choice !");
            }
        }
        public static void Main(string[] args)
        {
            Console.ForegroundColor = ConsoleColor.Yellow;

            Console.WriteLine("BNU CO453 Applications Programming 2020-2021!");
            Console.WriteLine();
            Console.WriteLine("1. Distance converter");
            Console.WriteLine("2. BMI calculator");
            Console.WriteLine("3. Student Grades calculator");
            Console.WriteLine("4. Social network application");
            Console.WriteLine("5. Ice, fire and wind RPS game");
            Console.WriteLine();
            string choice = Console.ReadLine();



            string[] choices = { " Distance Converter ", " BMI Calculator ", "Student Grades Calcuator", "Social network", "Ice and Wind Fire rps game" };

            int choiceNo = ConsoleHelper.SelectChoice(choices);

            if (choiceNo == 1)
            {
                converter.ConvertDistance();
            }
            if (choiceNo == 2)
            {
                Calculator.OutpuUnits();
            }
            if (choiceNo == 3)
            {
                calculator.CalculateMark();
            }
            if (choiceNo == 4)
            {
                app04.DisplayMenu();
            }
            if (choiceNo == 5)
            {
                app05.play();
            }
        }