In the HierarchicalDataTemplate, i got 2 textblocksand I want to copy the texts from the both. During the check-box click/check it'll update the text to a list.

The function is getting the text from one textblock.

How can i get text from both textblocks and update it to the list?

private List<string> selectedNames = new List<string>();
private void TreeView_Checked(object sender, RoutedEventArgs e)
{
    CheckBox chkBox = sender as CheckBox;
    StackPanel stackPanel = chkBox.Parent as StackPanel;
    TextBlock txtBlock = FindVisualChild<TextBlock>(stackPanel);
    bool isChecked = chkBox.IsChecked.HasValue ? chkBox.IsChecked.Value : false;
    if (isChecked)
    {
        selectedNames.Add(txtBlock.Text );            
    }
}

CheckBox get text function:

private static T FindVisualChild<T>(DependencyObject obj) where T : DependencyObject
{
    for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
    {
        DependencyObject child = VisualTreeHelper.GetChild(obj, i);
        if (child != null && child is T)
            return (T)child;
        else
        {
            T childOfChild = FindVisualChild<T>(child);
            if (childOfChild != null)
                return childOfChild;
        }
    }
    return null;
}

WPF HierarchicalDataTemplate:

<StackPanel Orientation="Horizontal" >
<CheckBox Name="checkBoxTree"  Checked="TreeView_Checked" Unchecked="checkBoxTree_Unchecked"
          Margin="0,4,0,0"  Style="{DynamicResource CheckBoxStyle1}"/>
<TextBlock Text="{Binding XPath=@Name, Mode=TwoWay}" />
<TextBlock >                              
           <Hyperlink NavigateUri="{Binding XPath=@WebSite}" RequestNavigate="Hyperlink_RequestNavigate"> 
               <TextBlock Text="{Binding XPath=@WebSite}" />
           </Hyperlink>   
</TextBlock>
</StackPanel>