C# Web MVC BeginActionLink

HtmlHelperExtensions.cs

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

namespace TestWeb.Extensions
{
    public static class HtmlHelperExtensions
    {
        static Dictionary<string, object> ToDictionary(object o)
        {
            return o.GetType().GetProperties().ToDictionary(n => n.Name, n => n.GetValue(o, null));
        }
        public static MvcLink BeginActionLink(this HtmlHelper helper, string actionName, string controllerName, object routeValues, object htmlAttributes)
        {
            var uh = new UrlHelper(helper.ViewContext.RequestContext);
            var attr = ToDictionary(htmlAttributes);
            attr.Add("href", uh.Action(actionName, controllerName, routeValues));
            return new MvcLink(helper.ViewContext.Writer, attr);
        }
    }
}

MvcLink.cs

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

namespace TestWeb.Extensions
{
    public class MvcLink : IDisposable
    {
        readonly TextWriter _writer;
        readonly TagBuilder builder = new TagBuilder("a");

        public MvcLink(TextWriter writer, IDictionary<string, object> htmlAttributes)
        {
            _writer = writer;
            builder.MergeAttributes(htmlAttributes);
            _writer.WriteLine(builder.ToString(TagRenderMode.StartTag));
        }

        public void Dispose()
        {
            _writer.WriteLine(builder.ToString(TagRenderMode.EndTag));
        }
    }
}