@if (Request.IsAuthenticated) {
    <ul class="nav pull-right">
        <li>
            @Html.ActionLink(User.Identity.Name, "Manage", "Account", null, new { @class = "username", title = "Manage" })
        </li>
        <li>
            @using (Html.BeginForm("LogOff", "Account", FormMethod.Post, new { id = "form-logout" })) {
                @Html.AntiForgeryToken()
                <button type="submit" class="btn-link">
                    Log Off
                </button>
            }
        </li>
    </ul>
}