Issues : While Disabling Combobox Items using ComboBoxItem.IsEnabled Property

Hi,

I have a combobox with Itemsource as List<String> Items , say the items have 3 item(Item1,Item2,Item3) in it. i need to  disable 2nd item. To achieve that i am iterating through combobox items.

Below Code Snippet will work fine if i use CombboxItem in XAML directly without itemsource..

I need to achieve the same using Itemsource(of String type)

foreach (ComboBoxItem s in combobox.Items)
            {
                if (s.Content.ToString() == "item2")
                {
                    s.IsEnabled = false;
                }
            }

I need to do that above for stringsIitemsource)..how to achieve that.?

-Antony Romar