AuthorizationServerDemos/CSharp/AuthorizationServer/Views/Shared/_Nav.cshtml

@using IdentityServer4.Extensions

@{
    string name = null;
    if (!true.Equals(ViewData["signed-out"]))
    {
        name = Context.User?.GetDisplayName();
    }
}

<div class="nav-page">
    <nav class="navbar navbar-expand-lg navbar-dark bg-secondary">

        <div class="container">
            <a href="~/" class="navbar-brand">
                <img style="height: 50px;" src="~/images/logo.svg" alt="logo">
            </a>

            @if (!string.IsNullOrWhiteSpace(name))
            {
                <ul class="navbar-nav mr-auto">
                    <li class="nav-item dropdown">
                        <a href="#" class="nav-link dropdown-toggle" data-toggle="dropdown">@name <b class="caret"></b></a>

                        <div class="dropdown-menu">
                            <a class="dropdown-item" asp-action="RegisterMobileDevice"
                                asp-controller="Account">RegisterMobileDevice</a>
                            <a class="dropdown-item" asp-action="Logout" asp-controller="Account">Logout</a>
                        </div>
                    </li>
                </ul>
            }
        </div>

    </nav>
</div>