BACKGROUND:  I'm using ASP.NET MVC4, .NET 4.0.

  If I load some resources using the MVC HTML Helper methods and some resources I load at run-time based on user input,  what should I use to ensure all of those resources are available to my application on the client side?

    I have a page that loads and shows a treeview and combo.  I'm using the MVC HTML Helper methods to show these items.   The data comes from the model.  This is working, both the treeview and combo show.

  When the user has selected criteria on the page,   I perform an ajax call to retrieve json data.  Once the json data is retrieved I can either show it in a grid, or show it in a chart, depending on the report data.

  I am able to show the data in a grid,  but I cannot get the chart to work .  I am getting the Javascript error...  Uncaught TypeError: Object [object Object] has no method 'igDataChart'

Here is the code i'm using to ensure my resources exist;    This is the first call on the page (index.cshtml).   I noticed if I move this into the HEAD tag of  the _Layout.cshtml nothing works!     What the heck???

@(Html.Infragistics().Loader().ScriptPath(Url.Content("~/Scripts/IG/js/")).CssPath(Url.Content("~/Content/IG/css")).Resources("igTree,igCombo,igGrid.*,igEditors,igDataChart.*").Render())

Why aren't the resources for the igDataChart being loaded??????????  Arghhh

Below is what is in the HEAD tag of my _Layout.cshtml. 

<link href="@Url.Content("~/Content/Site.css")" rel="stylesheet" type="text/css" />

<link href="@Url.Content("~/Content/themes/base/jquery.ui.all.css")" rel="stylesheet" type="text/css" />

<!--jQuery from CDN-->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.js" type="text/javascript"></script>

<!--jQuery UI from CDN-->
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.17/jquery-ui.js" type="text/javascript"></script>

<!--Modernizr from CDN. For css-boxsizing support build a custom version here: http://modernizr.com/download/-->
<script src="http://www.modernizr.com/downloads/modernizr-latest.js" type="text/javascript"></script>

<script src="@Url.Content("~/Scripts/AjaxLogin.js")" type="text/javascript"></script>

<!--igniteUI Combined JavaScript-->
<script src="@Url.Content("~/Scripts/IG/js/Infragistics.loader.js")" type="text/javascript"></script>

<script src="http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.2.1.js" type="text/javascript"></script>