Simple example of c# Action

  public static void write(int a)

        {

            Console.WriteLine(a); 

        }

        public static void writeTwice(int a)

        {

            Console.WriteLine(a);

            Console.WriteLine(a);

        }

        public static void DoIt(int a, Action<int> act)

        {

            Console.WriteLine("$$$$$$$$$$$$$$$$$");

            act(a);

            Console.WriteLine("$$$$$$$$$$$$$$$$$");

        }

       

        static void Main(string[] args)

        {

            DoIt(56, write);

            DoIt(56, writeTwice);