UnhandledException & ThreadException

When developing windows/console applications using. Net, it is recommended to catch the following two exceptions:

• AppDomain. CurrentDomain. UnhandledException
• Application. ThreadException

If there are some uncaught exceptions raised in a app-domain, the system default handler will report the exception and terminates the application by default. and if raised in a thread, the thread may be blocked. catchingUnhandledExceptionAndThreadExceptionEvents provides us a way of creating robust applications.

The following code segements demonstrate how to make use of the two events:

static void Main(){  try {   // Setup unhandled exception handlers   AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(OnUnhandledException);   // Unhandled Forms exceptions will be delivered to our ThreadException handler   Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(AppThreadException);   // Other code   ....  }  catch( Exception e ) {    ....  }}/// <summary>/// CLR unhandled exception/// </summary>private static void OnUnhandledException(Object sender, UnhandledExceptionEventArgs e){  HandleUnhandledException(e.ExceptionObject);}/// <summary>/// Displays dialog with information about exceptions that occur in the application./// </summary>private static void AppThreadException(object source, System.Threading.ThreadExceptionEventArgs e){  HandleUnhandledException(e.Exception);}private static void HandleUnhandledException(Object o){  Exception exp = o as Exception;  MessageBox.Show(exp.Message, "Application Error", MessageBoxButtons.OK, MessageBoxIcon.Stop);  Application.Exit(); // Shutting down}