Came across this while following the LINQ tutorial created by Michael Washington:

If you paste in this code from the website

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

using DotNetNuke;
using DotNetNuke.Security;
using LinqThings4Sale;

namespace DotNetNuke.Modules.LinqThings4Sale
{
  public partial class Categories : DotNetNuke.Entities.Modules.PortalModuleBase
    {
      protected void lnkBack_Click(object sender, EventArgs e)
      {
      Response.Redirect(Globals.NavigateURL(), true);
      }
    }
}

You will need to add

using DotNetNuke.Common; or you will get an error ("The name GLOBALS does not exist in the current context) when building the page.

Paul

Grr The example availiable for download is correct and has that line in there. It must have "dissapeared" somehow when I posted the example. I will fix it today.