public class LambdaTest

    {



        static void Main()

        {

            var counter = 0;

            WriteStream(() => counter++);

            Console.WriteLine("Final value of counter: {0}", counter);



        }

        static void WriteStream(Func<int> counter)

        {

            for (var i = 0; i < 10; ++i)

            {

                Console.WriteLine("{0}, ", counter());

            }

        }

    }

}