/// <summary>
        /// Save all activities to database (direct)
        /// </summary>
        /// <param name="companyId">companyId</param>
        public void Save(int companyId)
        {
            ToDoListInformationTDS toDoListInformationChanges = (ToDoListInformationTDS)Data.GetChanges();

            if (toDoListInformationChanges != null)
            {
                if (toDoListInformationChanges.ActivityInformation.Rows.Count > 0)
                {
                    ToDoListInformationActivityInformationGateway toDoListInformationActivityInformationGateway = new ToDoListInformationActivityInformationGateway(toDoListInformationChanges);

                    foreach (ToDoListInformationTDS.ActivityInformationRow row in (ToDoListInformationTDS.ActivityInformationDataTable)toDoListInformationChanges.ActivityInformation)
                    {
                        // Insert new activity
                        if ((!row.Deleted) && (!row.InDataBase))
                        {
                            // new values
                            int toDoId = row.ToDoID;
                            int refId = row.RefID;

                            int employeeId = toDoListInformationActivityInformationGateway.GetEmployeeID(toDoId, refId);
                            string type_ = toDoListInformationActivityInformationGateway.GetType_(toDoId, refId);
                            DateTime dateTime_ = toDoListInformationActivityInformationGateway.GetDateTime_(toDoId, refId);
                            string comment = toDoListInformationActivityInformationGateway.GetComment(toDoId, refId);

                            ToDoListToDoListActivity toDoListToDoListActivity = new ToDoListToDoListActivity(null);
                            toDoListToDoListActivity.InsertDirect(toDoId, refId, employeeId, type_, dateTime_, row.Deleted, row.COMPANY_ID, comment);
                        }

                        // Update activities
                        if ((!row.Deleted) && (row.InDataBase))
                        {
                            int toDoId = row.ToDoID;
                            int refId = row.RefID;
                            bool originalDeleted = false;
                            int originalCompanyId = companyId;

                            // original values
                            int originalEmployeeId = toDoListInformationActivityInformationGateway.GetEmployeeID(toDoId, refId);
                            string originalType_ = toDoListInformationActivityInformationGateway.GetType_(toDoId, refId);
                            DateTime originalDateTime_ = toDoListInformationActivityInformationGateway.GetDateTime_(toDoId, refId);
                            string originalComment = toDoListInformationActivityInformationGateway.GetComment(toDoId, refId);

                            // new values
                            int newEmployeeId = toDoListInformationActivityInformationGateway.GetEmployeeIDOriginal(toDoId, refId);
                            string newComment = toDoListInformationActivityInformationGateway.GetCommentOriginal(toDoId, refId);

                            ToDoListToDoListActivity toDoListToDoListActivity = new ToDoListToDoListActivity(null);
                            toDoListToDoListActivity.UpdateDirect(toDoId, refId, originalEmployeeId, originalType_, originalDateTime_, originalDeleted, originalCompanyId, originalComment, toDoId, refId, newEmployeeId, originalType_, originalDateTime_, originalDeleted, originalCompanyId, newComment);
                        }

                        // Deleted activity
                        if ((row.Deleted) && (row.InDataBase))
                        {
                            ToDoListToDoListActivity toDoListToDoListActivity = new ToDoListToDoListActivity(null);
                            toDoListToDoListActivity.DeleteDirect(row.ToDoID, row.RefID, row.COMPANY_ID);
                        }
                    }
                }
            }
        }