private void GetDescriptionLevels(DataTable table)
        {
            foreach (DataRow row in table.Rows)
            {
                int    id         = (int)row[0];
                object categoryId = row[3];

                DescriptionLevel descriptionLevel = new DescriptionLevel(row);

                if (categoryId != DBNull.Value)
                {
                    descriptionLevel.AddCategory(descriptionLevelCategories[(int)categoryId]);
                }

                descriptionLevels.Add(id, descriptionLevel);
            }
        }
 public void AddDescriptionLevel(DescriptionLevel descriptionLevel)
 {
     levels.Add(descriptionLevel);
 }