Delegate

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace DelegateAndEvent
{
    public delegate void nDelegate();
    public delegate void sDelegate(string str);
    public delegate void mulDelegate(string str);

   

    class Program
    {
        public delegate void eventDelegate(string str);

        public event eventDelegate log;

        protected void Onlog(string message)
        {
            if (log != null)
            {
                log(message);
            }
        }

        public void Process()
        {
            OnLog("Process() begin");
            OnLog("Process() end");
        }

        protected void OnLog(string message)
        {
            if (log != null)
            {
                log(message);
            }
        }

        public static void Print()
        {
            Console.WriteLine("Called by delegate");
            Console.ReadKey();
        }

        public static void prints(sDelegate sdele)
        {
            if (sdele != null)
            {
                sdele("Called by delegate!");
            }
        }

        public static void prints(mulDelegate mdele)
        {
            if (mdele != null)
            {
                mdele("Called by delegate!");
            }
        }

        static void Logger(string s)
        {
            Console.WriteLine(s);
        }

        static void getString(string ss)
        {
            Console.WriteLine(ss);
        }

        static void Main(string[] args)
        {
            Program p = new Program();           
            p.log += Logger;
            p.log += getString;
            p.Process();
           
            sDelegate sdelegate = new sDelegate(Logger);
            prints(sdelegate);

            mulDelegate mdelegate = null;
            mdelegate += Logger;
            mdelegate += getString;
            prints(mdelegate);

            nDelegate mDelegate = new nDelegate(Print);
            mDelegate();
        }
    }
}