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

            public override bool Contains(Object item)
            {
                InternalUpdateRange();
                if (item == null)
                {
                    for (int i = 0; i < _baseSize; i++)
                        if (_baseList[_baseIndex + i] == null)
                            return true;
                    return false;
                }
                else
                {
                    for (int i = 0; i < _baseSize; i++)
                        if (_baseList[_baseIndex + i] != null && _baseList[_baseIndex + i].Equals(item))
                            return true;
                    return false;
                }
            }