title: How to change the color of inside circle of radio button in WPF XAML
body: <p>This is my radio button:</p>
  
  <pre><code>&lt;RadioButton Content="Add" Grid.Column="1" Height="16" HorizontalAlignment="Left" Margin="50,13,0,0" Name="rdAdd" VerticalAlignment="Top" GroupName="AddEditRadio" Checked ="rdAdd_Checked" FontSize="12.667" /&gt;
  </code></pre>
  
  <p>Now the color of inner circle of radio button is orange.I want to change it to blue.</p>
  
  <p>Which property do I set to get "Blue" color?</p>