private void UpdateSome(PM_ALT_BASE entity, DbTransaction transaction)
        {
            ArgumentValidator.CheckForNullArgument(entity, "entity");
            ArgumentValidator.CheckForNullArgument(transaction, "transaction");

            PersistentPM_ALT_BASE PM_ALT_BASEEntity = entity as PersistentPM_ALT_BASE;

            StringBuilder sqlUpdateSome = new StringBuilder();

            sqlUpdateSome.Append("UPDATE dbo.PM_ALT_BASE SET ");

            PropertyInfo[] propertyInfos        = PM_ALT_BASEEntity.GetType().GetProperties();
            Hashtable      propertyValues       = new System.Collections.Hashtable();
            int            columnCountForUpdate = 0;

            foreach (PropertyInfo propertyInfo in propertyInfos)
            {
                if (EntityMapping.ContainsProperty(propertyInfo.Name))
                {
                    object     propertyValue = propertyInfo.GetValue(PM_ALT_BASEEntity, null);
                    ORProperty property      = EntityMapping[propertyInfo.Name];
                    if (!property.IsPrimaryKey)
                    {
                        if (!PM_ALT_BASEEntity.IsDefaultValue(propertyInfo.Name))
                        {
                            propertyValues[propertyInfo.Name] = propertyValue;

                            sqlUpdateSome.Append(" " + property.ColumnName + " = @" + property.ColumnName + ",");
                            columnCountForUpdate++;
                        }
                    }
                    else
                    {
                        propertyValues[propertyInfo.Name] = propertyValue;
                    }
                }
            }
            if (columnCountForUpdate == 0)
            {
                return;
            }

            sqlUpdateSome.Remove(sqlUpdateSome.Length - 1, 1);
            sqlUpdateSome.Append(" WHERE 1 = 1 ");
            sqlUpdateSome.Append(" AND AlertID = @AlertID ");

            try
            {
                Database  db        = GetDatabaseInstance();
                DbCommand dbCommand = db.GetSqlStringCommand(sqlUpdateSome.ToString());

                foreach (DictionaryEntry de in propertyValues)
                {
                    ORProperty property = EntityMapping[de.Key.ToString()];
                    db.AddInParameter(dbCommand, "@" + property.ColumnName, property.DatabaseType, de.Value);
                }

                int result = db.ExecuteNonQuery(dbCommand, transaction);

                if (result == 0)
                {
                    throw new EntityNotFoundException();
                }
            }
            catch (Exception ex)
            {
                ExceptionPolicy.HandleException(ex, ExceptionPolicy.DataAccessDefaultPolicy);
            }
        }