NumberFor extension for HtmlHelper

C# NumberFor

using System;
using System.Linq.Expressions;
using System.Web.Mvc;
using System.Web.Mvc.Html;
using System.Text.RegularExpressions;

namespace Website.Extensions
{
    public static class HtmlExtensions
    {
        public static MvcHtmlString NumberFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression)
        {
            return htmlHelper.NumberFor(expression, null);
        }
        
        public static MvcHtmlString NumberFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, object htmlAttributes)
        {
            Regex regex = new Regex(@"type\s*=\s*""text""", RegexOptions.IgnoreCase);
            string html = string.Empty;

            if (htmlAttributes == null)
            {
                html = InputExtensions.TextBoxFor(htmlHelper, expression).ToHtmlString();
            }
            else
            {
                html = InputExtensions.TextBoxFor(htmlHelper, expression, htmlAttributes).ToHtmlString();
            }

            if(regex.IsMatch(html))
            {
                html = regex.Replace(html, "type=\"number\"");
            }

            return MvcHtmlString.Create(html);
        }
    }
}

Html5Helper.cs

using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Reflection;
using System.Web.Mvc;
using System.Web.Mvc.Html;

namespace MvcApplication1.Helpers
{
    public static class Html5Helper
    {
        // Using same overload as 
        public static MvcHtmlString NumberFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, 
            Expression<Func<TModel, TProperty>> expression, IDictionary<string, object> htmlAttributes)
        {
            htmlAttributes["type"] = "number";

            return htmlHelper.TextBoxFor(expression, htmlAttributes);
        }

        public static MvcHtmlString NumberFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, 
            Expression<Func<TModel, TProperty>> expression)
        {
            return htmlHelper.NumberFor(expression, new object());    
        }

        public static MvcHtmlString NumberFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, 
            Expression<Func<TModel, TProperty>> expression, object htmlAttributes)
        {
            return htmlHelper.NumberFor(expression, htmlAttributes.ToDictionary());
        }

        public static IDictionary<string, object> ToDictionary(this object src)
        {
            IEnumerable<PropertyInfo> properties = src.GetType().GetProperties();

            return System.Linq
                .Enumerable
                .Aggregate(properties,
                           new Dictionary<string, object>(),
                           (map, pi) =>
                               {
                                   map[pi.Name] = pi.GetValue(src,new object[] {});
                                   return map;
                               });
        }
    }
}