title: ComboBoxItem with both Value and Text
body: <p>My goal is to have a <code>ComboBox</code> where every drop down item has a specific text and a specific item associated with it so that, for example, if some clicks "blah" - the selected item will be 3.</p>
  
  <p>As far as I can see - there's only one "Content" which represents both the Text and the Value. So how do I get both separately? (In either XAML or code, but <strong><em>without Binding</em></strong>.)</p>