WPF VB.Net

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    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="100" Width="160">
    
        
            
                
            
            
                
                    
                
            
        
    
    
                        Template="{StaticResource buttonTemplate}" Click="Button_Click">
        
    

//File:Window.xaml.vb
Imports System
Imports System.Windows
Imports System.Windows.Controls
Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Public Sub New()
      InitializeComponent()
    End Sub
    Private Sub Button_Click(sender As Object, e As RoutedEventArgs)
      Dim borderInTemplate As Border = DirectCast(button.Template.FindName("border", button), Border)
      Console.WriteLine(borderInTemplate.GetValue(Border.ActualWidthProperty))
    End Sub
  End Class
End Namespace