public void DeleteEpisode(int episodeId)
{
var episodeToRemove = _context.Episodes.FirstOrDefault(f => f.Id == episodeId);
if (episodeToRemove == null)
{
throw new InvalidOperationException("Element not found");
}
var connectionToRemove = _context.CharacterEpisode.Where(f => f.EpisodeId == episodeId);
_context.RemoveRange(connectionToRemove);
_context.Episodes.Remove(episodeToRemove);
}