title: WPF Combobox binding
body: <p>I got two Comboboxes and both of them have binding with the same Source.</p>
  
  <pre><code>&lt;ComboBox ItemsSource="{Binding Source={StaticResource UsersViewSource}}"
  </code></pre>
  
  <p>And when I change something in the first one, it reflects also to the second one. And I dunno how to keep their SelectedItem values separately, using the same ItemsSource.</p>