PostFooter_PreviousAndNextButtons.cshtml

<div>
    <div class="navlinks">
        @{
            var previousIndex = -1;
            var nextIndex = -1;

            var list = Documents[BlogPipelines.RawPosts].Where(x => x.ContainsKey("Published")).OrderByDescending(x => x.Get<DateTime>("Published")).ToList();
            for(int i = 0; i < list.Count; i++)
            {
                var doc = list[i];
                if (Model.FilePath(Keys.RelativeFilePath).Equals(doc.FilePath(Keys.RelativeFilePath)))
                {
                    previousIndex = i + 1;
                    nextIndex = i - 1;
                    break;
                }
            }

            IDocument next = ((nextIndex > -1) && (nextIndex < list.Count)) ? list[nextIndex] : null;
            IDocument previous = ((previousIndex > -1) && (previousIndex < list.Count)) ? list[previousIndex] : null;

            if (previous != null)
            {
                <a href="@Context.GetLink(previous)" title="Previous Post: @previous.String(BlogKeys.Title)" class="navlinks-prev">« @previous.String(BlogKeys.Title)</a>
            }

            if (next != null)
            {
                <a href="@Context.GetLink(next)" title="Next Post: @next.String(BlogKeys.Title)" class="navlinks-next">@next.String(BlogKeys.Title) »</a>
            }
        }
    </div>
</div>