public override ArrayList GetRange(int index, int count)
{
if (index < 0 || count < 0)
throw new ArgumentOutOfRangeException(index < 0 ? nameof(index) : nameof(count), SR.ArgumentOutOfRange_NeedNonNegNum);
Contract.EndContractBlock();
if (_list.Count - index < count)
throw new ArgumentException(SR.Argument_InvalidOffLen);
return new Range(this, index, count);
}