bundle不返回所有css文件

Question

我之前从未在MVC项目中使用过BundleCollection，但我试图添加jquery ui css文件。

我在BundleConfig.cs类

中定义了这个

bundles.Add(new StyleBundle("~/Content/css").Include(
    "~/Content/bootstrap.css",
    "~/Content/site.css",
    "~/Content/themes/base/jquery.ui.core.css",
    "~/Content/themes/base/jquery.ui.resizable.css",
    "~/Content/themes/base/jquery.ui.selectable.css",
    "~/Content/themes/base/jquery.ui.accordion.css",
    "~/Content/themes/base/jquery.ui.autocomplete.css",
    "~/Content/themes/base/jquery.ui.button.css",
    "~/Content/themes/base/jquery.ui.dialog.css",
    "~/Content/themes/base/jquery.ui.slider.css",
    "~/Content/themes/base/jquery.ui.tabs.css",
    "~/Content/themes/base/jquery.ui.datepicker.css",
    "~/Content/themes/base/jquery.ui.progressbar.css",
    "~/Content/themes/base/jquery.ui.theme.css"));

在layout.cshtml文件中我有

@Styles.Render("~/Content/css")

但是唯一呈现的是

<link href="/Content/bootstrap.css" rel="stylesheet"/>
<link href="/Content/site.css" rel="stylesheet"/>

但是jquery UI存在。

我错过了什么吗？