EfRepository

public virtual async Task UpdateAsync(T entity)
        {
            if (entity == null)
                throw new ArgumentNullException(nameof(entity));

            if (!IsAttached(entity, out EntityEntry<T> entry))
            {
                Entities.Attach(entity);
                _dbContext.Entry(entity).State = EntityState.Modified;
            }

            if (entry.State != EntityState.Unchanged)
            {
                try
                {
                    await _dbContext.SaveChangesAsync()
                        .ConfigureAwait(false);
                }
                catch (Exception ex)
                {
                    var error = ex.Message;
                }

                OnUpdate?.Invoke(this, new[] { entity });
            }
        }