Query regard of c# event simple code

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

namespace evnt
{
    public class myclass
    {
        public delegate void LogHandler(string msg);
        public event LogHandler Log;
        public void process()
        {
            OnLog("Process() begin");
            OnLog("Process() end");
        }
        protected void OnLog(string message)
        {
            if (Log != null)
            {
                Log(message);
            }
        }
    }
    public class FileLogger
    {
        FileStream filestream;
        StreamWriter streamwriter;
        public FileLogger(string filename)
        {
            filestream = new FileStream(filename,FileMode.Create);
            streamwriter = new StreamWriter(filestream);
        }
        public void Logger(string s)
        {
            streamwriter.WriteLine(s);
        }
        public void close()
        {
            streamwriter.Close();
            filestream.Close();
        }
    }
    public class testapplication
    {
        static void Logger(string s)
        {
            Console.WriteLine();
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            FileLogger f1 = new FileLogger("process.log");
            myclass mc = new myclass();
            mc.Log += new myclass.LogHandler(Logger);
            mc.Log += new myclass.LogHandler(f1.Logger);
            mc.process();
            f1.close();
        }
    }
}