protected virtual void Dispose(bool disposing)
        {
            if (!_disposedValue)
            {
                if (disposing)
                {
                    // TODO: dispose managed state (managed objects).
                    _navigationModule._event._eventHandler -= GetNavigationResultEvent;
                    _navigationModule.Dispose();
                }

                // TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
                // TODO: set large fields to null.

                _disposedValue = true;
            }
        }