Rad Pane and Listbox

[Karthik]

Hello ,

I am having two list boxes in a rad pane, I want one listbox visible to one user and both list boxes visible to another user.
When I am making the list box hidden the height is not adjusted, It is having a white space,
Here is the code and please refer to the pics.

<telerik:RadPane x:Name="customerfilterPane"
    Header="{Binding ApplicationStrings.CustomerPanelTitle, Source={StaticResource ResourceWrapper}}"
   CanUserClose="False"
   GotFocus="customerfilterPane_GotFocus"
   telerik:StyleManager.Theme="Summer">
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="*" />
                                <RowDefinition Height="*" />
                                <RowDefinition Height="50" />
                            </Grid.RowDefinitions>
                            <Border Grid.Row="0" >
                                <ListBox x:Name="lstCustomers"
                                    ScrollViewer.VerticalScrollBarVisibility="Auto"
                                     VerticalAlignment="Stretch"
                                     VerticalContentAlignment="Stretch"
                                     ItemsSource="{Binding ItemList,
                                     Source={StaticResource CustomerViewModel}}"
                                     HorizontalAlignment="Stretch"
                                     HorizontalContentAlignment="Stretch"
                                     >
                                <ListBox.ItemTemplate>
                                    <DataTemplate>
                                    <CheckBox x:Name="chkCustomer"
                                    IsChecked="{Binding IsChecked, Mode=TwoWay}"
                                    Content="{Binding CustomerName}"
                                    Click="chkCustomer_Click" />
                                    </DataTemplate>
                                </ListBox.ItemTemplate>
                            </ListBox>
                            </Border>

                            <Border  Grid.Row="1"  Margin="4" BorderThickness="3" CornerRadius="2"
                                      Visibility="{Binding IsPanelHiddenToCustomer, Source={StaticResource PlannerViewModel},Converter={StaticResource InvertedBooleanToVisibilityConverter}}">
                                <StackPanel Orientation="Vertical" Visibility="{Binding IsPanelHiddenToCustomer, Source={StaticResource PlannerViewModel},Converter={StaticResource InvertedBooleanToVisibilityConverter}}">
                                    <TextBlock Text="{Binding ApplicationStrings.PlannerPanelTitle, Source={StaticResource ResourceWrapper}}" />

                                    <ListBox x:Name="lstCustomerPlanner"    ScrollViewer.VerticalScrollBarVisibility="Auto"
                                     VerticalAlignment="Stretch" Height="180"
                                     Visibility="{Binding IsPanelHiddenToCustomer, Source={StaticResource PlannerViewModel},Converter={StaticResource InvertedBooleanToVisibilityConverter}}"
                                     VerticalContentAlignment="Stretch"
                                     ItemsSource="{Binding ItemList, Source={StaticResource PlannerViewModel}}"
                                     HorizontalAlignment="Stretch"
                                     HorizontalContentAlignment="Stretch"
                                     >
                                <ListBox.ItemTemplate>
                                    <DataTemplate>
                                        <CheckBox x:Name="chkCustomerPlanner"
                                                  IsChecked="{Binding IsChecked, Mode=TwoWay}"
                                                  Content="{Binding PlannerId}"
                                                  Click="chkPlanner_Click" />
                                    </DataTemplate>
                                </ListBox.ItemTemplate>
                            </ListBox>
                            </StackPanel>
                            </Border>
                            <StackPanel Orientation="Horizontal"
                                        FlowDirection="LeftToRight"
                                        HorizontalAlignment="Center"
                                        VerticalAlignment="Stretch"
                                        Grid.Row="2">
                                <Button Content="{Binding ApplicationStrings.CheckAll, Source={StaticResource ResourceWrapper}}"
                                        Style="{StaticResource StandardButtonStyle}"
                                        Click="Customer_CheckAll" Margin="0,0,4,0" />
                                <Button Content="{Binding ApplicationStrings.UncheckAll, Source={StaticResource ResourceWrapper}}"
                                        Margin="0 0 4 0"
                                        Style="{StaticResource StandardButtonStyle}"
                                        Click="Customer_UncheckAll" />
                                <Button Content="{Binding ApplicationStrings.Apply, Source={StaticResource ResourceWrapper}}"
                                        Margin="0 0 0 0" x:Name="btnCustApply"
                                        Style="{StaticResource StandardButtonStyle}"
                                        Click="Customer_Apply" />
                            </StackPanel>
                        </Grid>
                    </telerik:RadPane>

Can anyone please help me out with this issue,  I would be great full to you,

Thank you
Kumara.