access textblock in listbox in windows phone app
===

I have the following xaml code

    <phone:PhoneApplicationPage.Resources>
            <DataTemplate x:Key="SyndicationItemTemplate">
                <StackPanel>
                    <TextBlock Text="{Binding Title.Text}" TextWrapping="Wrap" FontSize="24" Foreground="Lime" TextAlignment="Center" FontWeight="ExtraBold" />
                    <TextBlock TextWrapping="Wrap" Text="{Binding Summary.Text}" Name="text1" Tap="text1_Tap" />
                    <HyperlinkButton Content="Δες το άρθρο" NavigateUri="{Binding Links[0].Uri.AbsoluteUri, Mode=OneWay}" TargetName="_blank" FontSize="22" Foreground="Red" Background="#FF1A6DCE" />
                </StackPanel>
            </DataTemplate>
        </phone:PhoneApplicationPage.Resources>

and

    <Grid x:Name="ContentPanel" Grid.Row="1" Margin="0,115,0,0" Background="#5D101010">
                <ListBox x:Name="lst" ItemTemplate="{StaticResource SyndicationItemTemplate}" ItemsSource="{Binding Items}" />
            </Grid>
            <TextBlock Grid.Row="1" Height="109" HorizontalAlignment="Left" Name="text" Text="" VerticalAlignment="Top" Width="480" />
        </Grid>

i want to access Textblock in listbox so when the user tap the textblock he can see the text in another page. In c# code i made this

    private void text1_Tap(object sender, System.Windows.Input.GestureEventArgs e)
            {
                string selText = lst.Items[lst.SelectedIndex].ToString();
                
    
                text.Text = selText;
            }

but i can't take the text in the second textblock. when i tap the text1 in the text Textblock i see 

System Service Model SyndicationItem

I feel that i am close to the result but something is going wrong i am waiting for your help

Thank you very much 