title: Bootstrap Lumen theme's NavBar issue
body: <p>I have included bootstrap's lumen theme in my ASP.NET MVC project and replaced it with the default bootstrap.css theme. Now the issue I'm facing is that the navbar of the theme doesn't look like it should be. In fact there's no navbar at all. </p>
  
  <pre><code>using System.Web;
  using System.Web.Optimization;
  
  namespace vidly
  {
      public class BundleConfig
      {
          // For more information on bundling, visit https://go.microsoft.com/fwlink/?LinkId=301862
          public static void RegisterBundles(BundleCollection bundles)
          {
              bundles.Add(new ScriptBundle("~/bundles/jquery").Include(
                          "~/Scripts/jquery-{version}.js"));
  
              bundles.Add(new ScriptBundle("~/bundles/jqueryval").Include(
                          "~/Scripts/jquery.validate*"));
  
              // Use the development version of Modernizr to develop with and learn from. Then, when you're
              // ready for production, use the build tool at https://modernizr.com to pick only the tests you need.
              bundles.Add(new ScriptBundle("~/bundles/modernizr").Include(
                          "~/Scripts/modernizr-*"));
  
              bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(
                        "~/Scripts/bootstrap.js"));
  
              bundles.Add(new StyleBundle("~/Content/css").Include(
                        "~/Content/bootstrap-Lumenn.css",
                        "~/Content/site.css"));
          }
      }
  }
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/iIbCg.png" alt="enter image description here"></p>