@{
    Layout = "/Views/Shared/_Layout.cshtml";
}
<div class="row">
    <div class="jumbotron text-center">
        @if (User.Identity.IsAuthenticated)
        {
            <p>当前用户权限不足</p>
        }
        else
        {
            <p>权限不足，请登录</p>
        }
    </div>
</div>