Event args that are handed back after an asynchronous operation has completed.
See 'BeginInvoke' method.
Inheritance: System.EventArgs
 private void OnAsyncError(AsyncCallbackArgs e){if (AsyncError != null) AsyncError(this, e);}
 public ActionInvoker(Action action)
 {
     this.action = action;
     CallbackArgs = new AsyncCallbackArgs();
 }