ASP.NET

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

namespace FileWatchingDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            FileSystemWatcher watcher = new FileSystemWatcher(Environment.SystemDirectory);
            watcher.Filter = "*.ini";
            watcher.IncludeSubdirectories = true;
            watcher.NotifyFilter = NotifyFilters.Attributes | NotifyFilters.Size;

            watcher.Changed += new FileSystemEventHandler(watcher_Changed);

            watcher.EnableRaisingEvents = true;

            //Console.WriteLine(Environment.SystemDirectory.ToString());

            Console.Read();
            
        }

        static void watcher_Changed(object sender, FileSystemEventArgs e)
        {
            Console.WriteLine("Changed: {1}", e.FullPath);
        }
    }
}

Console.WriteLine("Changed: {1}", e.FullPath);

<sessionState
    mode="SQLServer"
    timeout="30"
    cookieless="AutoDetect"
</sessionState>