goto_1.cs

    class SwitchTest
    {
        static void Main()
        {
            Console.WriteLine("Coffee sizes: 1=Small 2=Medium 3=Large");
            Console.Write("Please enter your selection: ");
            string s = Console.ReadLine();
            int n = int.Parse(s);
            int cost = 0;
            switch (n)
            {
                case 1:
                    cost += 25;
                    break;
                case 2:
                    cost += 25;
                    goto case 1;
                case 3:
                    cost += 50;
                    goto case 1;
                default:
                    Console.WriteLine("Invalid selection.");
                    break;
            }
            if (cost != 0)
            {
                Console.WriteLine("Please insert {0} cents.", cost);
            }
            Console.WriteLine("Thank you for your business.");

            // Keep the console open in debug mode.
            Console.WriteLine("Press any key to exit.");
            Console.ReadKey();
        }
    }
    /*
    Sample Input:  2
     
    Sample Output:
    Coffee sizes: 1=Small 2=Medium 3=Large
    Please enter your selection: 2
    Please insert 50 cents.
    Thank you for your business.
    */