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copied!<p>You can use the <a href="http://msdn.microsoft.com/en-us/library/system.appdomain.processexit.aspx" rel="noreferrer"><code>ProcessExit</code></a> event of the <a href="http://msdn.microsoft.com/en-us/library/system.appdomain.aspx" rel="noreferrer"><code>AppDomain</code></a>:</p> <pre><code>class Program { static void Main(string[] args) { AppDomain.CurrentDomain.ProcessExit += new EventHandler(CurrentDomain_ProcessExit); // do some work } static void CurrentDomain_ProcessExit(object sender, EventArgs e) { Console.WriteLine("exit"); } } </code></pre> <p><strong>Update</strong></p> <p>Here is a full example program with an empty "message pump" running on a separate thread, that allows the user to input a quit command in the console to close down the application gracefully. After the loop in MessagePump you will probably want to clean up resources used by the thread in a nice manner. It's better to do that there than in ProcessExit for several reasons:</p> <ul> <li>Avoid cross-threading problems; if external COM objects were created on the MessagePump thread, it's easier to deal with them there.</li> <li>There is a time limit on ProcessExit (3 seconds by default), so if cleaning up is time consuming, it may fail if pefromed within that event handler.</li> </ul> <p>Here is the code:</p> <pre><code>class Program { private static bool _quitRequested = false; private static object _syncLock = new object(); private static AutoResetEvent _waitHandle = new AutoResetEvent(false); static void Main(string[] args) { AppDomain.CurrentDomain.ProcessExit += new EventHandler(CurrentDomain_ProcessExit); // start the message pumping thread Thread msgThread = new Thread(MessagePump); msgThread.Start(); // read input to detect "quit" command string command = string.Empty; do { command = Console.ReadLine(); } while (!command.Equals("quit", StringComparison.InvariantCultureIgnoreCase)); // signal that we want to quit SetQuitRequested(); // wait until the message pump says it's done _waitHandle.WaitOne(); // perform any additional cleanup, logging or whatever } private static void SetQuitRequested() { lock (_syncLock) { _quitRequested = true; } } private static void MessagePump() { do { // act on messages } while (!_quitRequested); _waitHandle.Set(); } static void CurrentDomain_ProcessExit(object sender, EventArgs e) { Console.WriteLine("exit"); } } </code></pre>

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