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);
        }
    }
}