title: Xceed CheckComboBox not properly showing selected values from items hardcoded in XAML
body: <p>I try to use a <a href="https://github.com/xceedsoftware/wpftoolkit/wiki/CheckComboBox/a7baf42b0ce84afe686ce790e9909af51838dcaa" rel="nofollow noreferrer">CheckComboBox</a> control from the <a href="https://github.com/xceedsoftware/wpftoolkit" rel="nofollow noreferrer">Xceed</a> library.</p>
  
  <p>When I select an item, the control displays <code>system.windows.controls.comboxitem:"value"</code> instead of just <code>value</code></p>
  
  <p>Is there a way to display only the value of the selected item without its type?</p>
  
  <pre><code>&lt;xctk:CheckComboBox&gt;
      &lt;ComboBoxItem Content="SA" /&gt;
      &lt;ComboBoxItem Content="NA" /&gt;      
  &lt;/xctk:CheckComboBox&gt;   
  </code></pre>