Bootstrap Icons not showing in published ASP.NET MVC application

Question

--- NB: Go to the EDITED 2 section for summary ----

I have an ASP.NT MVC (4) application. I integrated (twitter)Bootstrap to it. Bootstrap is working perfectly, but the

Answer 1

adding: BundleTable.EnableOptimizations = False fixed my issue.

Public Sub RegisterBundles(ByVal bundles As BundleCollection)
    BundleTable.EnableOptimizations = False
    bundles.Add(New StyleBundle("~/DefaultStyles").Include(
      "~/Content/custom3.css"))
End Sub