Alternative to C# LINQ Skip() & Take() for pagination objects

FeedPagerService.cs

internal static class FeedPagerService
{
    private const int PageSize = 10;

    internal static (List<FeedItem> feeds, int pageSize, int maxRecords) SkipRecords(int pageIndex, List<FeedItem> feeds)
    {
        if (pageIndex < 0) pageIndex = 0; //fix negative

        var startPage = pageIndex <= 1 ? 0 : (pageIndex - 1) * PageSize;

        int endPage;

        if (pageIndex <= 1)
        {
            endPage = 10;
        }
        else
        {
            endPage = PageSize * pageIndex;
        }

        var maxRecords = feeds.Count;

        var resultFeed = new List<FeedItem>(10);

        for (var i = startPage; i < endPage; i++)
        {
            if (i < maxRecords) resultFeed.Add(feeds[i]);
        }

        return (resultFeed, PageSize, maxRecords);
    }
}