title: Better to use SelectedIndex or SelectedItem for ComboBox?
body: <p>Lets say I have a <code>ComboBox</code> with the values "One, Two, Three"</p>
  
  <p>As a general rule, when testing for conditional events based on the <code>ComboBox</code> selection, would it be better to reference the ComboBox.SelectedItem or ComboBox.SelectedIndex?</p>
  
  <pre><code>If (ComboBox.SelectedItem = "One") 
  </code></pre>
  
  <p>or</p>
  
  <pre><code>If (ComboBox.SelectedIndex = 0)
  </code></pre>
  
  <p>Or does neither have an advantage over the other?</p>