Simple WPF Bar Chart Control

<UserControl x:Class="SimpleChart.Charts.BarChart"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     Height="640" Width="480">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="0.05*"></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"></ColumnDefinition>
        </Grid.ColumnDefinitions>
            <Slider Name="zoomSlider" Grid.Row="0" Grid.Column="1" Height="20" DockPanel.Dock="Top" Minimum="1" Maximum="5" Value="1"/>
            <ScrollViewer Grid.Row="1" Grid.Column="1" CanContentScroll="True" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
            <Canvas  x:Name="chartArea" ClipToBounds="False" Background="Black">
                <Canvas.LayoutTransform>
                     <ScaleTransform ScaleX="{Binding ElementName=zoomSlider, Path=Value}"
                          ScaleY="{Binding ElementName=zoomSlider, Path=Value}"/>
                </Canvas.LayoutTransform>
                <TextBlock  x:Name="txtNoData" FontSize="12" Text="No data found." Visibility="Hidden"
                      Opacity="100" Foreground="Red">
                </TextBlock>
            </Canvas>
        </ScrollViewer>
    </Grid>
</UserControl>