Bootstrap glyphicons briefcase not showing in IE Browser

Question

Here is html code for bootstrap icon, Bootstrap v3.3.4

 <span class="glyphicon glyphicon-briefcase" aria-hidden="true"></span>

this html code is working fine with all browsers, i can see briefcase icon properly. But with same code after developing in MVC Platfrom i can't see briefcase icon on IE and Safari (Windows). this problem with few other icon also like content = "\e136", content = "\e142"

Developed Code in MVC:

Simple HTML Code

Answer 1

Maybe this post will answer your question : here

adding

<!--[if lt IE 9]>
<script src="html5shiv.js"></script>
<script src="respond.min.js"></script>
<![endif]-->

Could solve your problem, by the way, which IE version are you using?

EDIT: then it could be IE security issue : here