 <p>OK I found it,</p> <p>The error was the <strong>ColumnSeries</strong> was missing the <strong>Title</strong> attribute, like this:</p> <pre><code>&lt;charting:Chart Name="columnChart" Grid.Row="1" Grid.Column="1" Width="400" Height="400"&gt; &lt;charting:Chart.Series&gt; &lt;charting:ColumnSeries Title="Chart Title" ItemsSource="{Binding items}" IndependentValueBinding="{Binding Name}" DependentValueBinding="{Binding Value}" IsSelectionEnabled="True"&gt; &lt;/charting:ColumnSeries&gt; &lt;/charting:Chart.Series&gt; &lt;/charting:Chart&gt; </code></pre> <p>It seems that the <strong>Title</strong> attribute is mandatory.</p>