Given this code sequence:<StackPanel Grid.Column="0"
Grid.Row="1"
Orientation="Vertical"
Margin="10"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Grid.ColumnSpan="2">
<controlsToolkit:Expander ExpandDirection="Down" Header="Identify Results">
<Grid x:Name="IdentifyGrid"
HorizontalAlignment="Center"
VerticalAlignment="Top"
Margin="0,0,0,0">
<Rectangle Style="{StaticResource PanelRectangle}" Grid.ColumnSpan="2"/>
<StackPanel x:Name="IdentifyResultsPanel"
Orientation="Vertical"
HorizontalAlignment="Center"
Margin="20,20,20,30">
<TextBlock Width="200"
TextWrapping="Wrap"
Text="Click a feature on the map."
FontWeight="Bold"
HorizontalAlignment="Center" />
<ComboBox x:Name="IdentifyComboBox"
MinWidth="150"
SelectionChanged="cb_SelectionChanged"
Margin="0,10,0,5" />
<ScrollViewer x:Name="DataGridScrollViewer"
HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Auto"
Width="220"
MaxHeight="340">
<slData:DataGrid x:Name="IdentifyDetailsDataGrid"
AutoGenerateColumns="False"
HeadersVisibility="None"
Background="White">
<slData:DataGrid.Columns>
<slData:DataGridTextColumn Width="95"
Binding="{Binding Path=Key}"
FontWeight="Bold" />
<slData:DataGridTextColumn Width="215"
Binding="{Binding Path=Value}" />
</slData:DataGrid.Columns>
</slData:DataGrid>
</ScrollViewer>
</StackPanel>
</Grid>
</controlsToolkit:Expander>
</StackPanel>
Where do I place the ColumnSpan="2" property to allow the rectangle and its contents to expand over the column boundary? I have tried several and none of them seem to work. btw - the second column contains a map.Thanks
