title: WPF Binding - StringFormat - Not Formatting
body: <p>I have a ToolTip with a value set as:</p>
  
  <pre><code>Value="{Binding Path=DataItem.EquitySold, StringFormat=Reserved (Equity Share: \{0\}%)}"
  </code></pre>
  
  <p>The toolip is displaying as:</p>
  
  <blockquote>
    <p>72</p>
  </blockquote>
  
  <p>But I expect it to be:</p>
  
  <blockquote>
    <p>Reserved (Equity Share: 72%)</p>
  </blockquote>
  
  <p>What is wrong with my binding?</p>