Where< TSource >() [1/2]

static IEnumerable< TSource > System.Linq.Enumerable.Where< TSource > ( this IEnumerable< TSource > source, Func< TSource, bool > predicate )

inlinestatic

Definition at line 8533 of file Enumerable.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        if (predicate == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.predicate);
        }
        if (source is Iterator<TSource> iterator)
        {
            return iterator.Where(predicate);
        }
        if (source is TSource[] array)
        {
            if (array.Length != 0)
            {
                return new WhereArrayIterator<TSource>(array, predicate);
            }
            return Empty<TSource>();
        }
        if (source is List<TSource> source2)
        {
            return new WhereListIterator<TSource>(source2, predicate);
        }
        return new WhereEnumerableIterator<TSource>(source, predicate);
    }

References System.array, System.Linq.predicate, System.Linq.source, and System.Linq.ThrowHelper.ThrowArgumentNullException().