public async Task <Deck> Add(Deck deck)
{
await _dbContext.Deck.AddAsync(deck);
await _dbContext.SaveChangesAsync();
return(deck);
}
public Task DeleteDeckCardsByDeckId(long deckId)
{
_dbContext.DeckCard.RemoveRange(from dc in _dbContext.DeckCard where dc.DeckId == deckId select dc);
return(_dbContext.SaveChangesAsync());
}