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/// <summary> 
/// Сохраняет элементы справочника
/// </summary>
public IEnumerable SaveBookElements(IList elements) {
	IList result = null;

	try {
		if (elements != null && elements.Count > 0) {
			if (elements.GetType().GetGenericArguments().Length == 1 && elements[0].GetType() != elements.GetType().GetGenericArguments()[0]) {
				var mi = typeof(BooksWorker).GetMethod("SaveTypedBookElements", BindingFlags.NonPublic | BindingFlags.Instance)
					.MakeGenericMethod(new[] { elements[0].GetType() });

				var casted = (IList)Activator.CreateInstance(typeof(List<>).MakeGenericType(new[] { elements[0].GetType() }));

				foreach (var t in elements) {
					casted.Add(t);
				}

				result = mi.Invoke(this, new object[] { casted }) as IList;
			}
		}
	}
	catch (Exception ex) {
		throw new ApplicationException("Ошибка!", ex);
	}

	return result;
}