1        public class Watcher
2        {
3
4            public static void Main()
5            {
6
7                string[] args = System.Environment.GetCommandLineArgs();
8
9                // If a directory is not specified, exit program.
10                if (args.Length != 2)
11                {
12                    // Display the proper way to call the program.
13                    Console.WriteLine("Usage: Watcher.exe (directory)");
14                    return;
15                }
16
17                // Create a new FileSystemWatcher and set its properties.
18                FileSystemWatcher watcher = new FileSystemWatcher();
19                watcher.Path = args[1];
20                /* Watch for changes in LastAccess and LastWrite times, and
21                   the renaming of files or directories. */
22                watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
23                   | NotifyFilters.FileName | NotifyFilters.DirectoryName;
24                // Only watch text files.
25                watcher.Filter = "*.txt";
26
27                // Add event handlers.
28                watcher.Changed += new FileSystemEventHandler(OnChanged);
29                watcher.Created += new FileSystemEventHandler(OnChanged);
30                watcher.Deleted += new FileSystemEventHandler(OnChanged);
31                watcher.Renamed += new RenamedEventHandler(OnRenamed);
32
33                // Begin watching.
34                watcher.EnableRaisingEvents = true;
35
36                // Wait for the user to quit the program.
37                Console.WriteLine("Press \'q\' to quit the sample.");
38                while (Console.Read() != 'q')
39                    ;
40            }
41
42            // Define the event handlers.
43            private static void OnChanged(object source, FileSystemEventArgs e)
44            {
45                // Specify what is done when a file is changed, created, or deleted.
46                Console.WriteLine("File: " + e.FullPath + " " + e.ChangeType);
47            }
48
49            private static void OnRenamed(object source, RenamedEventArgs e)
50            {
51                // Specify what is done when a file is renamed.
52                Console.WriteLine("File: {0} renamed to {1}", e.OldFullPath, e.FullPath);
53            }
54        }