---
title: "How to: Use a ThicknessConverter Object"
ms.date: "03/30/2017"
dev_langs: 
  - "csharp"
  - "vb"
helpviewer_keywords: 
  - "border thickness [WPF]"
  - "ThicknessConverter objects [WPF]"
ms.assetid: 52682194-d7fd-499c-8005-73fcc84e7b2c
---
# How to: Use a ThicknessConverter Object

## Example  

 This example shows how to create an instance of <xref:System.Windows.ThicknessConverter> and use it to change the thickness of a border.  
  
 The example defines a custom method called `changeThickness`; this method first converts the contents of a <xref:System.Windows.Controls.ListBoxItem>, as defined in a separate [!INCLUDE[TLA#tla_xaml](../../../includes/tlasharptla-xaml-md.md)] file, to an instance of <xref:System.Windows.Thickness>, and later converts the content into a <xref:System.String>. This method passes the <xref:System.Windows.Controls.ListBoxItem> to a <xref:System.Windows.ThicknessConverter> object, which converts the <xref:System.Windows.Controls.ContentControl.Content%2A> of a <xref:System.Windows.Controls.ListBoxItem> to an instance of <xref:System.Windows.Thickness>. This value is then passed back as the value of the <xref:System.Windows.Controls.Border.BorderThickness%2A> property of the <xref:System.Windows.Controls.Border>.  
  
 This example does not run.  
  
 [!code-csharp[ThicknessConverter#1](~/samples/snippets/csharp/VS_Snippets_Wpf/ThicknessConverter/CSharp/Window1.xaml.cs#1)]
 [!code-vb[ThicknessConverter#1](~/samples/snippets/visualbasic/VS_Snippets_Wpf/ThicknessConverter/VisualBasic/Window1.xaml.vb#1)]  
  
## See also

- <xref:System.Windows.Thickness>
- <xref:System.Windows.ThicknessConverter>
- <xref:System.Windows.Controls.Border>
- [How to: Change the Margin Property](/previous-versions/dotnet/netframework-3.5/ms750561(v=vs.90))
- [How to: Convert a ListBoxItem to a new Data Type](/previous-versions/dotnet/netframework-3.5/ms749147(v=vs.90))
- [Panels Overview](../controls/panels-overview.md)