or
var lineSeries = new LineSeries(); lineSeries.CategoryBinding = new PropertyNameDataPointBinding() { PropertyName = "TimeStamp" }; lineSeries.ValueBinding = new PropertyNameDataPointBinding() { PropertyName = "Value" }; lineSeries.ItemsSource = (chart.Chart as GuiAnalogQueue).Records;<telerik:Needle x:Name="needle" IsAnimated="True" Value="{Binding Value}"/><telerik:Needle x:Name="needle" IsAnimated="True" Value="{Binding chart.Chart.Value}"/>