static void Main(string[] args)
        {
            int     choice;
            vehicle v_obj = new vehicle();

            Console.Write("List of Vehicles \n1.Car \n2.Bike \n3.Truck \n4.Bus");
            Console.Write("\nEnter your Choice: ");
            choice = int.Parse(Console.ReadLine());
            if (choice == 1)
            {
                v_obj.choi = choice;
                vehicle.Field(v_obj);
            }
            else if (choice == 2)
            {
                v_obj.choi = choice;
                vehicle.Field(v_obj);
            }
            else if (choice == 3)
            {
                v_obj.choi = choice;
                vehicle.Field(v_obj);
            }
            else if (choice == 4)
            {
                v_obj.choi = choice;
                vehicle.Field(v_obj);
            }
            else
            {
                Console.WriteLine("\nInvalid Input ");
            }
            Console.ReadKey();
        }
        public static void Field(vehicle v)
        {
            switch (v.get_choice)
            {
            case 1:
                Console.WriteLine(car);
                break;

            case 2:

                Console.WriteLine(bike);
                break;

            case 3:

                Console.WriteLine(truck);
                break;

            case 4:

                Console.WriteLine(bus);
                break;
            }
        }