private void OnAssignNewKeysRequestMsg(AssignNewKeysRequestMsg msg) { MessageBoxResult result = MessageBox.Show( "Are you sure, you want a new key pair?\nYou have to inform your friends and have to send them your new public key file.", "Security Check", MessageBoxButton.YesNo, MessageBoxImage.Question); if (result == MessageBoxResult.Yes) { _messenger.Send(new AssignNewKeysConfirmMsg()); } }