private static void ClearListItems(SPList list)
        {
            if (list == null || list.ItemCount <= 0) return;

            DateTime startDateTime = DateTime.Now;
            string message1 = string.Format("Удаление документов в \"{0}\". Всего элементов: {1}.", list.Title,
                list.ItemCount);
            Console.WriteLine(message1);

            string batchPattern =
                String.Format(
                    "<Method><SetList Scope=\"Request\">{0}</SetList><SetVar Name=\"ID\">{{0}}</SetVar><SetVar Name=\"Cmd\">Delete</SetVar><SetVar Name=\"owsfileref\">{{1}}</SetVar></Method>",
                    list.ID);

            var query = new SPQuery
            {
                //ViewFieldsOnly = true,
                Folder = list.RootFolder,
                RowLimit = 50,
                ViewFields = string.Concat(new object[]
                {
                    CAML.FieldRef("FileRef"),
                    CAMLExtendet.FieldRef(SPBuiltInFieldId.ID),
                    CAMLExtendet.FieldRef(SPBuiltInFieldId.UniqueId),
                    CAML.FieldRef(NtdFields.OldId)
                }),
                Query = string.Concat(
                    CAML.Where(
                        CAML.And(
                            CAML.Eq(CAMLExtendet.FieldRef(SPBuiltInFieldId.ContentType),
                                CAML.Value("Computed", "Элемент НТД")),
                            CAML.Or(
                                CAML.IsNull(CAML.FieldRef(NtdFields.OldId)),
                                CAML.Eq(CAMLExtendet.FieldRef(SPBuiltInFieldId.ItemChildCount), CAML.Value(0))
                                )
                            //CAML.Leq(CAMLExtendet.FieldRef(SPBuiltInFieldId.ID), CAML.Value(21000))
                                )),
                    CAML.OrderBy(new object[]
                    {
                        CAMLExtendet.FieldRef(SPBuiltInFieldId.ID, CAML.SortType.Ascending)
                    }))
            };

            Console.WriteLine("> Перенос элементов из списка в корзину узла.");

            int deletedItemsCount = 0;
            SPListItemCollection foundListItemCollection;

            DateTime moveToRecycleBinStartDateTime = DateTime.Now;

            do
            {
                foundListItemCollection = list.GetItems(query);

                if (foundListItemCollection.Count <= 0) break;

                var batchBuilder = new StringBuilder();
                batchBuilder.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?><Batch>");

                var uniqueIds = new List<Guid>(foundListItemCollection.Count);
                for (int i = 0; i < foundListItemCollection.Count; i++)
                {
                    SPListItem item = foundListItemCollection[i];
                    batchBuilder.AppendFormat(batchPattern, item.ID, item.Folder.ServerRelativeUrl);
                    uniqueIds.Add(item.UniqueId);
                }
                batchBuilder.Append("</Batch>");

                string errors = list.ParentWeb.ProcessBatchData(batchBuilder.ToString());
                if (!string.IsNullOrEmpty(errors))
                {
                    Console.WriteLine(">> Ошибка: {0}", errors);
                }

                //list.ParentWeb.RecycleBin.Delete(uniqueIds.ToArray());

                list.Update();

                deletedItemsCount += foundListItemCollection.Count;

            } while (foundListItemCollection.Count > 0);

            DateTime moveToRecycleBinEndDateTime = DateTime.Now;
            TimeSpan moveToRecycleBinDuration = moveToRecycleBinEndDateTime.Subtract(startDateTime);

            Console.WriteLine("> Перенесено элементов: {0} за {1}", deletedItemsCount, moveToRecycleBinDuration);

            Console.WriteLine("> Очистка корзины узла.");

            try
            {
                list.ParentWeb.RecycleBin.DeleteAll();
            }
            catch
            {
            }

            DateTime endDateTime = DateTime.Now;
            TimeSpan duration = endDateTime.Subtract(startDateTime);
            string message2 = string.Format("Удаление документов в \"{0}\" завершено за {1}", list.Title, duration);
            Console.WriteLine(message2);
        }