Untitled

Using multiple FileSystemWatchers
private static FileSystemWatcher watcherTxt;
private static FileSystemWatcher watcherXml;

static void Main(string[] args)
{
    String dir = @"C:temp";

    watcherTxt = new FileSystemWatcher();
    watcherTxt.Path = dir;
    watcherTxt.Filter = "*.txt";
    watcherTxt.EnableRaisingEvents = true;
    watcherTxt.Created += new FileSystemEventHandler(onCreatedFile);

    watcherXml = new FileSystemWatcher();
    watcherXml.Path = dir;
    watcherXml.Filter = "*.xml";
    watcherXml.EnableRaisingEvents = true;
    watcherXml.Created += new FileSystemEventHandler(onCreatedFile);

    Console.ReadLine();
}

private static void onCreatedFile(object sender, FileSystemEventArgs e)
{
    if (watcherTxt == sender)
    {
        Console.WriteLine("Text Watcher Detected: " + e.FullPath);
    }

    if (watcherXml == sender)
    {
        Console.WriteLine("XML Watcher Detected: " + e.FullPath);
    }
}