Alsing.SourceCode.UndoBlockCollection.ValidateIndex C# (CSharp) Метод

        private void ValidateIndex(int index, bool allowEqualEnd)
        {
            int max = (allowEqualEnd) ? (m_count) : (m_count - 1);
            if (index < 0 || index > max)
                throw new ArgumentOutOfRangeException(
                    "Index was out of range.  Must be non-negative and less than the size of the collection.", index,
                    "Specified argument was out of the range of valid values.");
        }