public AtomDtAccess(IDbAccess OleDB)
            {
                this.OleDB = OleDB;

                IsCourse = typeof(T) == typeof(EnSubject);
                Kind     = typeof(T).Name;

                foreach (OleDbDataReader reader in OleDB.EachRows(
                             "select Id, FName, FColor from TAtomAndGrp"
                             + " where FKind = '" + Kind + "'"))
                {
                    T ety = new T();
                    ety.Id   = Convert.ToInt64(reader[0]);
                    ety.Name = reader[1].ToString();
                    if (IsCourse)
                    {
                        (ety as EnSubject).Color = Color.FromArgb(ExConvert.TryToInt32(reader[2], 0));
                    }

                    Entities.Add(ety.Id, ety);
                }
            }