Checking login user role in razor page

@if (Request.IsAuthenticated && User.IsInRole("Administrators"))
{
     <div id="sidebar">
        <div class="module">
           <ul class="menu">
              <li>@Html.ActionLink("Home", "Index", "Home")</li>
              <li>@Html.ActionLink("About", "About", "Home")</li>
              <li>@Html.ActionLink("Contact", "Contact", "Home")</li>
            </ul>
         </div>
         <div class="mainContent">
             Hello, @User.Identity.Name !
         </div>
     </div>
}