* Use Guid.Equals(Guid) instead of the == override
* Ban the usage of Guid.Equals(Object) to prevent accidental boxing
* Compare to default(Guid) instead of Guid.Empty
It was originally a POST https://github.com/jellyfin/jellyfin/blob/9af6eda0b495649e3a77694b2bb30abad1a26484/MediaBrowser.Api/Library/LibraryService.cs#L155