public async Task <Advertisement> CreateAdvertisementAsync(Advertisement advertisement) { if (advertisement == null) { throw new ArgumentNullException(nameof(advertisement)); } _dbContext.Advertisements.Add(advertisement); await _dbContext.SaveChangesAsync(); return(advertisement); }
public async Task <Phone> CreatePhoneAsync(Phone phone) { if (phone == null) { throw new ArgumentNullException(nameof(phone)); } _dbContext.Phones.Add(phone); await _dbContext.SaveChangesAsync(); return(phone); }