Catel.MVVM.CommandManagerWrapper.Unsubscribe C# (CSharp) Method

        private void Unsubscribe()
        {
            if (!_subscribed)
            {
                return;
            }

#if NET
            View.PreviewKeyDown -= OnKeyDown;
#else
            View.KeyDown -= OnKeyDown;
#endif

            _subscribed = false;
        }