HtmlHelperExtensions.cs

using System;
using System.Collections.Generic;
using System.Web.Mvc;
using System.Web.WebPages;

namespace Whatever
{
    public static class HtmlHelperExtensions
    {
        /// <summary>
        /// Renders each item in a list using the supplied template, using an HTML comment to avoid whitespace
        /// being present between each element.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="items"></param>
        /// <param name="template"></param>
        /// <returns></returns>
        public static HelperResult ElementsWithoutWhitespace<T>(this HtmlHelper html, List<T> items, Func<T, HelperResult> template)
        {
            const string commentHtml = @"<!-- Inline block fix - don't delete
-->";
            return new HelperResult(writer =>
            {
                int index = 0;
                foreach (var item in items)
                {
                    bool last = index == items.Count - 1;
                    template(item).WriteTo(writer);
                    if (!last)
                    {
                        writer.Write(commentHtml);
                    }
                    index++;
                }
            });
        }
    }
}