WP7 - LongListSelector, how to hide vertical scroll bar - windows-phone-7

Question

I need to hide vertical scrollbar in LongListSelector. For this I use:
ScrollViewer.VerticalScrollBarVisibility="Hidden"
In ListBox it works well but in LongListSelector it doesn't work.
This is my LongListSelector code:
<Grid x:Name="ContentPanel"
Grid.Row="1"
Margin="12,0,12,0">
<toolkit:LongListSelector x:Name="TasksLongListSelector"
Margin="0,12,0,0"
Background="Transparent"
ScrollViewer.VerticalScrollBarVisibility="Hidden">
<toolkit:LongListSelector.GroupHeaderTemplate>
<DataTemplate>
<Border Width="431"
Height="53"
HorizontalAlignment="Left"
BorderThickness="2"
BorderBrush="White"
Margin="13,0,0,22">
<Grid HorizontalAlignment="Stretch"
VerticalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<TextBlock Text="{Binding Key, Converter={StaticResource LocalDateConverter}}"
FontSize="20"
FontWeight="Bold"
Foreground="White"
HorizontalAlignment="Left"
Padding="14,10,0,0" />
<Image Grid.Column="1"
Source="/Images/CalendarWhiteIcon.png"
Width="21"
Height="21"
HorizontalAlignment="Right"
VerticalAlignment="Top"
Margin="0,13,14,0" />
</Grid>
</Border>
</DataTemplate>
</toolkit:LongListSelector.GroupHeaderTemplate>
<toolkit:LongListSelector.ItemTemplate>
<DataTemplate>
<Button Background="White"
Width="455"
Height="105"
Margin="0,-12,0,12"
Tag="{Binding Id}"
HorizontalContentAlignment="Stretch"
VerticalContentAlignment="Stretch"
Click="Button_Click_1">
<Grid HorizontalAlignment="Stretch"
VerticalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="24" />
</Grid.RowDefinitions>
<TextBlock Grid.ColumnSpan="4"
Text="{Binding Name}"
FontSize="24"
Foreground="#400000" />
<Image Grid.Row="1"
Visibility="{Binding Project, Converter={StaticResource StringToVisibilityConverter}}"
Source="/Images/ProjectIcon.png"
Width="20"
Height="18"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Margin="0,0,5,0" />
<TextBlock Grid.Row="1"
Grid.Column="1"
Visibility="{Binding Project, Converter={StaticResource StringToVisibilityConverter}}"
Text="{Binding Project, Converter={StaticResource ToUppercaseConverter}}"
FontSize="16"
Foreground="#666666"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Margin="0,-2,9,0"
LineStackingStrategy="BlockLineHeight" />
<Image Grid.Row="1"
Grid.Column="2"
Visibility="{Binding Context, Converter={StaticResource StringToVisibilityConverter}}"
Source="/Images/ContextIcon.png"
Width="20"
Height="18"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Margin="-3,1,1,0" />
<TextBlock Grid.Row="1"
Grid.Column="3"
Visibility="{Binding Context, Converter={StaticResource StringToVisibilityConverter}}"
Text="{Binding Context, Converter={StaticResource ToUppercaseConverter}}"
FontSize="16"
Foreground="#666666"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Margin="0,-2,0,0"
LineStackingStrategy="BlockLineHeight" />
</Grid>
</Button>
</DataTemplate>
</toolkit:LongListSelector.ItemTemplate>
</toolkit:LongListSelector>
</Grid>
How can I hide vertical scrollbar in LongListSelector?

Answer 1

I found solution. To LongListSelector event Loaded add this code:
ScrollViewer sv = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(TasksLongListSelector, 0), 0) as ScrollViewer;
ScrollBar sb = ((FrameworkElement)VisualTreeHelper.GetChild(sv, 0)).FindName("VerticalScrollBar") as ScrollBar;
sb.Width = 0;