If you go into partial views, then right click and to create one, in the drop down menu there will be various options, select navigation and this would provide something like this:

@{ var selection = CurrentPage.Site().Children.Where("Visible"); }

<ul class="menuClass">
    @foreach(var item in selection)
    {
          <li class="@(item.IsAncestorOrSelf(CurrentPage) ? "current" : null)">
              <a href="@item.Url">@item.Name</a>
          </li>
     }
 </ul>

This is the default code that will provide a dynamic navigation menu, when ever your create a new page in the content section the navigation will update it's self. To use this in your code you simply write:

@Html.Partial("PartialName")

That will render the partial make sure to saround in any parent elements.