title: ListBox SelectedItems Binding
body: <p>I want to bind Listbox selectedItems to array. But .NET throws exception at runtime.</p>
  
  <pre><code>d.SetBinding(ListBox.SelectedItemsProperty, new Binding { Source = SomeArray });
  </code></pre>
  
  <p>Where <code>d</code> is some ListBox from XAML.</p>
  
  <p>Exception: </p>
  
  <blockquote>
    <p>Selected Item cannot be bound.</p>
  </blockquote>
  
  <p>Why?</p>