Angular route always need slash if it's case insensitive

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AngularJs

MVC5

I created virtual directory on IIS called SA and if typed "Localhost/SA" or "Localhost/Sa/" everything working fine but if i typed the URL Caseinsensitive like this "Localhost/Sa" without slash in the end routes failed to return any page.
- if i disabled html5mode, it's getting "404 page not found" page.
$locationProvider.html5Mode(false);

What I have tried:

- Here's the workarounds that i used :

$urlMatcherFactory.caseInsensitive(true);
    $urlMatcherFactory.strictMode(true); // or off nothing is work

    $urlRouterProvider.rule(function ($injector, $location) {
               var path = $location.path(), normalized = path;//.toLowerCase();
               template = path;

               if (path !== normalized) {
                  $location.replace().path(normalized);
               }
              }
           });

- tried to concatenate "/" to the end of the URL by adding $urlRouterProvider.rule but it's not working also, and couldn't concatenate "/" to the end of the URL before angular bootstrap.

I am done with this issue please help.