Hillshade renderer

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<UserControl x:Class="ArcGISRuntime.WPF.Samples.RasterHillshade.RasterHillshade"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:esri="http://schemas.esri.com/arcgis/runtime/2013">
    <Grid>
        <esri:MapView x:Name="MyMapView" />
        <Border Style="{StaticResource BorderStyle}">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition />
                    <ColumnDefinition Width="3*" />
                </Grid.ColumnDefinitions>
                <Grid.RowDefinitions>
                    <RowDefinition />
                    <RowDefinition />
                    <RowDefinition />
                    <RowDefinition />
                </Grid.RowDefinitions>
                <TextBlock Grid.Row="0"
                           Grid.Column="0"
                           VerticalAlignment="Center"
                           Text="Slope type:"
                           TextAlignment="Right" />
                <ComboBox x:Name="SlopeTypeCombo"
                          Grid.Row="0"
                          Grid.Column="1"
                          Margin="5" />
                <TextBlock Grid.Row="1"
                           Grid.Column="0"
                           VerticalAlignment="Center"
                           Text="Altitude:"
                           TextAlignment="Right" />
                <Slider x:Name="AltitudeSlider"
                        Grid.Row="1"
                        Grid.Column="1"
                        Margin="5"
                        Maximum="90"
                        Minimum="0">
                    <Slider.ToolTip>
                        <ToolTip Content="{Binding RelativeSource={RelativeSource Self}, Path=PlacementTarget.Value}" ContentStringFormat="{}{0:0}" />
                    </Slider.ToolTip>
                </Slider>
                <TextBlock Grid.Row="2"
                           Grid.Column="0"
                           VerticalAlignment="Center"
                           Text="Azimuth:"
                           TextAlignment="Right" />
                <Slider x:Name="AzimuthSlider"
                        Grid.Row="2"
                        Grid.Column="1"
                        Margin="5"
                        Maximum="360"
                        Minimum="0">
                    <Slider.ToolTip>
                        <ToolTip Content="{Binding RelativeSource={RelativeSource Self}, Path=PlacementTarget.Value}" ContentStringFormat="{}{0:0}" />
                    </Slider.ToolTip>
                </Slider>
                <Button x:Name="ApplyHillshadeButton"
                        Grid.Row="3"
                        Grid.Column="0"
                        Grid.ColumnSpan="2"
                        Margin="5"
                        Padding="3"
                        Click="ApplyHillshadeButton_Click"
                        Content="Apply hillshade"
                        IsEnabled="False" />
            </Grid>
        </Border>
    </Grid>
</UserControl>