Chart with undefined data

DonFreeman

I have a chart which is to display data from a selected feature from a featurelayer. Data is selected via identify. Thus the chart series' has no data until the feature is clicked. This causes the page to fail to load. Is there a way to deal with this? The problem line is

<toolkit:ColumnSeries x:Name="ChartSeries" 
                                                     Title="ADT" 
                                                     IndependentValueBinding="{Binding Tag}" 
                                                     DependentValueBinding="{Binding Content}" 
                                                     ItemsSource="{Binding Source={StaticResource Counts2}, Path=Items}" />

Thanks