title: Styling RadChart
body: <p>I am trying to style a RadChart. It is a bargraph and I want to change the default colors of the bars. So I used the RadChart.PaletteBrushes and defined SolidBrush colors(Found this method in the following link : <a href="http://www.telerik.com/help/wpf/radchart-styling-and-appearance-styling-chart-series.html" rel="nofollow">http://www.telerik.com/help/wpf/radchart-styling-and-appearance-styling-chart-series.html</a>) as follows:</p>
  
  <pre><code>&lt;telerik:RadChart Background="Transparent" HorizontalContentAlignment="Center" HorizontalAlignment="center"&gt;
              &lt;telerik:RadChart.PaletteBrushes&gt;
                  &lt;SolidColorBrush Color="#FF0B3F74"/&gt; 
                  &lt;SolidColorBrush Color="#FF721111"/&gt; 
                  &lt;SolidColorBrush Color="#FFA1720B"/&gt; 
              &lt;/telerik:RadChart.PaletteBrushes&gt;
          &lt;/telerik:RadChart&gt;
  </code></pre>
  
  <p>But now, an exception as follows occurs while running the application : </p>
  
  <p>'System.Windows.Media.SolidColorBrush' must have IsFrozen set to false to modify.</p>
  
  <p>This exception occurs randomly. Also, in the stack trace, there is a mention of RadTransition Control too. Why could this error be occuring? How can it be solved?</p>