FileSystemWatcher watcher;

[PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
public MainWindow()
{
	InitializeComponent();

	if (Args.Length > 1)
	{
		CurrentImage = Args[1];

		ImageFolderWatcher();

		OpenImage(CurrentImage);
	}
}
        
private void ImageFolderWatcher()
{
	watcher = new FileSystemWatcher();
	watcher.Path = CurrentImage;

	watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
	   | NotifyFilters.FileName | NotifyFilters.DirectoryName;

	watcher.Filter = "*.*";

	watcher.Changed += new FileSystemEventHandler(OnChanged);
	watcher.Created += new FileSystemEventHandler(OnChanged);
	watcher.Deleted += new FileSystemEventHandler(OnChanged);
	watcher.Renamed += new RenamedEventHandler(OnChanged);

	watcher.EnableRaisingEvents = true;
}

private void OnChanged(object source, FileSystemEventArgs e)
{
	// Do something
}

private void OnRenamed(object source, RenamedEventArgs e)
{
	// Do something
}