public Error SaveError(Error error)
        {
            var state = error.Id == 0 ? EntityState.Added : EntityState.Modified;

            context.Entry(error).State = state;
            context.SaveChanges();
            return(error);
        }
        private Frequency createFrequencyOfLogDescription(string logDescription)
        {
            Frequency frequency = new Frequency()
            {
                LogDescription = logDescription,
                NumberOfEvents = 1
            };

            var state = EntityState.Added;

            context.Entry(frequency).State = state;
            context.SaveChanges();

            return(frequency);
        }