System\Linq\GroupBy.cs (8)
407if (_elements.Length == _count)
412_elements[_count] = element;
418if (_elements.Length != _count)
429yield return _elements[i];
445bool ICollection<TElement>.Contains(TElement item) => Array.IndexOf(_elements, item, 0, _count) >= 0;
448Array.Copy(_elements, 0, array, arrayIndex, _count);
452int IList<TElement>.IndexOf(TElement item) => Array.IndexOf(_elements, item, 0, _count);
467return _elements[index];