public void Delete(TEntity entity)
        {
            if (EFContext.Entry <TEntity>(entity).State == EntityState.Detached)
            {
                EFSet.Attach(entity);
            }

            EFSet.Remove(entity);
        }
        public void DeleteRange(IEnumerable <TEntity> entities, int batchSize = 100, bool autoCommitEnabled = false)
        {
            try
            {
                if (entities == null)
                {
                    throw new ArgumentNullException("entities");
                }

                if (entities.HasItems())
                {
                    if (batchSize <= 0)
                    {
                        // insert all in one step
                        entities.Each(x => EFSet.Add(x));
                    }
                    else
                    {
                        int  i     = 1;
                        bool saved = false;
                        foreach (var entity in entities)
                        {
                            EFSet.Remove(entity);
                            saved = false;
                            if (i % batchSize == 0)
                            {
                                i     = 0;
                                saved = true;
                            }
                            i++;
                        }
                    }
                }
            }
            catch (DbEntityValidationException ex)
            {
                throw ex;
            }
        }