simple SignalR based css file watcher live reload thingy

app.js

;(function ($, window, undefined) {
  'use strict';

  var $doc = $(document),
      $head = $doc.find('head'),
      Modernizr = window.Modernizr;

  $.fn.foundationAlerts           ? $doc.foundationAlerts() : null;
  $.fn.foundationButtons          ? $doc.foundationButtons() : null;
  $.fn.foundationAccordion        ? $doc.foundationAccordion() : null;
  $.fn.foundationNavigation       ? $doc.foundationNavigation() : null;
  $.fn.foundationTopBar           ? $doc.foundationTopBar() : null;
  $.fn.foundationCustomForms      ? $doc.foundationCustomForms() : null;
  $.fn.foundationMediaQueryViewer ? $doc.foundationMediaQueryViewer() : null;
  $.fn.foundationTabs             ? $doc.foundationTabs({callback : $.foundation.customForms.appendCustomMarkup}) : null;
  $.fn.foundationTooltips         ? $doc.foundationTooltips() : null;

  $('input, textarea').placeholder();

  // UNCOMMENT THE LINE YOU WANT BELOW IF YOU WANT IE8 SUPPORT AND ARE USING .block-grids
  // $('.block-grid.two-up>li:nth-child(2n+1)').css({clear: 'both'});
  // $('.block-grid.three-up>li:nth-child(3n+1)').css({clear: 'both'});
  // $('.block-grid.four-up>li:nth-child(4n+1)').css({clear: 'both'});
  // $('.block-grid.five-up>li:nth-child(5n+1)').css({clear: 'both'});

  // Hide address bar on mobile devices
  if (Modernizr.touch) {
    $(window).load(function () {
      setTimeout(function () {
        window.scrollTo(0, 1);
      }, 0);
    });
  }

  $doc.ready(function() {
    console.log('mailboxd.');

    var cssWatcher = $.connection.cssWatcher;

    var sequence = Math.floor(Math.random() * 1000000000001);

    $.extend(cssWatcher, {
      reload: function () {
        var style = $doc.find('link');
        var url = style.attr('href');
        if (url.indexOf("?v=") == -1) {
          url = url + '?v=' + sequence;
        }
        sequence++;
        $head.append($('<link href="' + url + '" rel="stylesheet">'));
      }
    });

    $.connection.hub.start().done(function() {
      cssWatcher.ping(function(pong) {
        console.log(pong);
      });
    });
  });

})(jQuery, this);

CssWatcher.cs

using System.Collections;
using System.IO;
using System.Web;
using SignalR;
using SignalR.Hubs;

  [HubName("cssWatcher")]
  public class CssWatcher : Hub
  {
    public static void Init()
    {
      var fileWriteTime = new Hashtable();
      var cssPath = Path.Combine(HttpRuntime.AppDomainAppPath, "stylesheets");
      
      var fsw = new FileSystemWatcher(cssPath)
      {
        Filter = "*.css",
        IncludeSubdirectories = false
      };

      fsw.Changed += (sender, args) =>
      {
        try
        {
          var fullPath = args.FullPath;
          var currentLastWriteTime = File.GetLastWriteTime(fullPath).ToString();

          if (fileWriteTime.ContainsKey(fullPath) && fileWriteTime[fullPath].ToString() == currentLastWriteTime)
            return;

          var instance = GlobalHost.ConnectionManager.GetHubContext<CssWatcher>();
          instance.Clients.reload();

          fileWriteTime[fullPath] = currentLastWriteTime;
        }
        catch
        {
        }
      };

      fsw.EnableRaisingEvents = true;
    }

    public string Ping()
    {
      return "Pong";
    }
  }