ElementAt< TSource >() [2/2]

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

inlinestatic

Definition at line 4613 of file Enumerable.cs.

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

References System.Linq.index, System.list, System.Linq.source, System.Linq.ThrowHelper.ThrowArgumentNullException(), and System.Linq.ThrowHelper.ThrowArgumentOutOfRangeException().