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Determine the layout position of an element using the LayoutInformation

<Window  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     x:Class="layout_information.Window1"     Title="LayoutInformation Sample">     <Border Margin="5" HorizontalAlignment="Left" VerticalAlignment="Top">       <Grid Name="myGrid" Height="150">         <Grid.ColumnDefinitions>           <ColumnDefinition Width="250"/>         </Grid.ColumnDefinitions>         <Grid.RowDefinitions>           <RowDefinition />           <RowDefinition />           <RowDefinition />         </Grid.RowDefinitions>         <TextBlock Name="txt1" Margin="5" Grid.Column="0" Grid.Row="0">Hello World!</TextBlock>         <Button Click="ShowLayoutSlot" Width="125" Height="25" Grid.Column="0" Grid.Row="1">Show Bounding Box</Button>       </Grid>   </Border>   </Window> //File:Window.xaml.cs using System; using System.Windows; using System.Windows.Media; using System.Windows.Shapes; using System.Windows.Controls; using System.Windows.Controls.Primitives; namespace layout_information {   public partial class Window1 : Window   {         public void ShowLayoutSlot(object sender, System.Windows.RoutedEventArgs e)         {             RectangleGeometry myRectangleGeometry = new RectangleGeometry();             myRectangleGeometry.Rect = LayoutInformation.GetLayoutSlot(txt1);                          GeometryDrawing myGeometryDrawing = new GeometryDrawing();             Path myPath = new Path();             myPath.Data = myRectangleGeometry;             myPath.Stroke = Brushes.LightGoldenrodYellow;             myPath.StrokeThickness = 1;             Grid.SetColumn(myPath, 0);             Grid.SetRow(myPath, 0);             myGrid.Children.Add(myPath);                          Console.WriteLine(LayoutInformation.GetLayoutSlot(txt1).ToString());         }   } }