ElementAtOrDefault< TSource >() [2/2]

static ? TSource System.Linq.Enumerable.ElementAtOrDefault< TSource > ( this IEnumerable< TSource > source, int index )

inlinestatic

Definition at line 4664 of file Enumerable.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        if (source is IPartition<TSource> partition)
        {
            bool found;
            return partition.TryGetElementAt(index, out found);
        }
        if (source is IList<TSource> list)
        {
            if (index < 0 || index >= list.Count)
            {
                return default(TSource);
            }
            return list[index];
        }
        TryGetElement<TSource>(source, index, out var element);
        return element;
    }

References System.Collections.Generic.Dictionary< TKey, TValue >.Count, System.Linq.index, System.list, System.Linq.source, System.Linq.ThrowHelper.ThrowArgumentNullException(), and System.Linq.Enumerable.TryGetElement< TSource >().