System.Collections.ArrayList.Range.RemoveRange C# (CSharp) Method

            public override void RemoveRange(int index, int count)
            {
                if (index < 0 || count < 0)
                    throw new ArgumentOutOfRangeException(index < 0 ? nameof(index) : nameof(count), SR.ArgumentOutOfRange_NeedNonNegNum);
                if (_baseSize - index < count)
                    throw new ArgumentException(SR.Argument_InvalidOffLen);
                Contract.EndContractBlock();

                InternalUpdateRange();
                // No need to call _bastList.RemoveRange if count is 0.
                // In addition, _baseList won't change the version number if count is 0. 
                if (count > 0)
                {
                    _baseList.RemoveRange(_baseIndex + index, count);
                    InternalUpdateVersion();
                    _baseSize -= count;
                }
            }