I was trying to save this simple navigation

<nav>
<ul>
    @{ var homeNode = Model.AncestorOrSelf("Home");}
       <li>
            <a href="@homeNode.Url">@homeNode.Name</a>
        </li>
    @foreach (var page in homeNode.Children.Where("Visible"))
    { 
        <li>
            <a href="@page.Url">@page.Name</a>
        </li>
 }
</ul>
   @if (page.Children.Where("Visible").Count() > 0)
  {
        <ul>
           @foreach (var childPage in page.Children.Where("Visible"))
           {
                <li><a href="@childPage.Url">@childPage.Name</a></li>
            }
        </ul>
  }
</ul>
</nav>

But i got this error 

Saving scripting file failed: d:\_produktion\techcollege.dk\MacroScripts\635221987629512119_Navigation.cshtml(40): error CS0135: 'page' conflicts with the declaration 'umbraco.page'