title: RadioButton ContentStringFormat not working
body: <p>I have been struggling to get this code below to work. The binding works but the <code>ContentStringFormat</code> in the first or <code>StringFormat</code> in the second one doesn't seem to work.</p>
  
  <pre><code>&lt;RadioButton Content="{Binding ClientCode}" ContentStringFormat="{}{0} copy"
               IsChecked="{Binding Path= FilterType,
                   Converter={StaticResource EBConverter}, 
                   ConverterParameter={x:Static wordMerge:FilterType.ClientCopy}}" 
               Width="90"/&gt;
  </code></pre>
  
  <p>The above code just returns the binding value say "ABC" but I am expecting "ABC copy"</p>
  
  <pre><code> &lt;RadioButton IsChecked="{Binding Path= FilterType,
                   Converter={StaticResource EBConverter},
                   ConverterParameter={x:Static wordMerge:FilterType.ClientCopy}}" 
                Width="90"&gt;
      &lt;RadioButton.Content&gt;
          &lt;TextBlock Text="{Binding ClientCode, StringFormat={}{0} copy}"/&gt;
       &lt;/RadioButton.Content&gt;
   &lt;/RadioButton&gt;
  </code></pre>
  
  <p>The above code not returning any values for binding.</p>
  
  <p><strong>Updated</strong>
  The string copy is not displayed during design time or at runtime in both cases.</p>