Sitemap - Hiding Login/Logout etc

The following code shows to hide "Login" if users are already logged in and hide "Logout" if users are not logged in from the menu.

1   protected void Menu1_DataBound(object sender, EventArgs e)
2   {
3            Menu menu = (System.Web.UI.WebControls.Menu)sender;
4            MenuItem menuToRemove = null;
5           
6            if (HttpContext.Current.User.Identity.IsAuthenticated)
7            {
8                foreach (MenuItem smn in menu.Items)
9                {
10                   if (smn.Text == "Login")
11                   {
12                       MenuItem parent = smn.Parent;
13                       if (parent != null)
14                       {
15                           parent.ChildItems.Remove(smn);
16                       }
17                       else
18                       {
19                           menuToRemove = smn;
20                       }
21   
22                   }
23               }
24               if (menuToRemove != null)
25               {
26                   menu.Items.Remove(menuToRemove);
27               }
28           }
29           else
30           {
31               foreach (MenuItem smn in menu.Items)
32               {
33                   if (smn.Text == "Logout")
34                   {
35                       MenuItem parent = smn.Parent;
36   
37                       if (parent != null)
38                       {
39                           parent.ChildItems.Remove(smn);
40                       }
41                       else
42                       {
43                           menuToRemove = smn;
44                       }
45   
46                   }
47               }
48              
49               if (menuToRemove != null)
50               {
51                   menu.Items.Remove(menuToRemove);
52               }
53           }
54          
55          
56  }