Hello, when I wrote for in the children items .Where(x => x.Content.IsVisible()) I get an error message.

Server Error in '/' Application. Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Source Error: Line 23: { Line 24:

Line 25: @foreach (var subMenu in item.Children.Where(x => x.Content.IsVisible())) Line 26: { Line 27: Source File: e:\Projects\Microsoft\devISKUR v7.8.1\umbISKUR-dev(v7.8.1)\Views\Partials\USNNavigation\USNMainNavigation.cshtml Line: 25

Where am I doing wrong? Can you help me? please.

@inherits Umbraco.Web.Mvc.UmbracoTemplatePage @using Umbraco.Web; @using Umbraco.Web.Models; @using Cogworks.Meganav.Models; @{ var navigationNodeID = Umbraco.TypedContent(1075); var test = navigationNodeID.GetPropertyValue("USNMainNavigation");

<ul class="nav navbar-nav pull-right">
    @foreach (var item in navigationNodeID.GetPropertyValue<IEnumerable<MeganavItem>>("USNMainNavigation"))
    {
        <li class="dropdown">
            <a href="@item.Url" target="@item.Target" id="@item.Id" class="nav-link"  data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">@item.Title <span class="caret"></span></a>

            @*@if (item.Children.Where(x => x.Content.GetProperty("isVisible")).Any())*@

            @if (item.Children.Any())
            {
                <ul class="dropdown-menu">
                    @foreach (var subMenu in item.Children.Where(x => x.Content.IsVisible()))
                    {                                
                        <li>
                            <a href="@subMenu.Url" class="nav-link">@subMenu.Title</a>
                        </li>
                    }
                </ul>
            }

        </li>

    }
</ul>

}