using System;
using static System.Console;

namespace DelegateVsFunc
{
    public delegate void StringCharCallback(char c);

    public static class Extensions
    {
        public static void ForEach(this string str, StringCharCallback callback)
        {
            foreach (var c in str)
            {
                callback(c);
            }
        }

        public static void ForEach(this string str, Action<char> callback)
        {
            str.ForEach(callback);
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            string str = "abcdefg";

            //Miksi pitää castata?
            str.ForEach((StringCharCallback)((c) => WriteLine(c)));

            ReadLine();
        }
    }
}