Notifying Windows Explorer about files in use

using System;
using System.IO;
using LukeSw.IO;

namespace FileLockerApplication
{
    class Program
    {
        static void Main()
        {
            Console.WriteLine("Registering the application.");
            try
            {
                FileLocker.Register();
            }
            catch (Exception e)
            {
                Console.WriteLine("Cannot register - cannot modify the registry.");
                Console.WriteLine(e);
                return;
            }

            Console.Write("Enter the filename: ");
            string file = Console.ReadLine();
            if (string.IsNullOrEmpty(file))
            {
                Console.WriteLine("Entered an empty string. Exiting.");
                return;
            }
            try
            {
                Console.WriteLine("Creating/opening the file.");
                using (FileStream fs = File.Open(file, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None))
                {
                    Console.Write("You can try to delete the file. Then press the enter.");
                    Console.ReadLine();
                    using (FileLocker fl = new FileLocker(file))
                    {
	                Console.Write("Windows Explorer has been notifies about used file. Try to delete it now.");
                        Console.Write("Press enter to cancel the notification.");
                        Console.ReadLine();
                    }
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("Cannot create or lock the file.");
                Console.WriteLine(e);
            }
            finally
            {
                Console.WriteLine("Unregistering the application.");
                try
                {
                    FileLocker.Unregister();
                }
                catch (Exception e)
                {
                    Console.WriteLine("Cannot unregister - cannot modify the registry.");
                    Console.WriteLine(e);
                }
            }
        }
    }
}