---
title: "Expander"
ms.date: "03/30/2017"
f1_keywords: 
  - "AutoGeneratedOrientationPage"
helpviewer_keywords: 
  - "expanding headers [WPF]"
  - "controls [WPF], Expander"
  - "headers [WPF]"
  - "Expander control [WPF]"
  - "collapsing headers [WPF]"
ms.assetid: e9dfc8d6-4555-47b9-a4de-0acd64f8770a
---
# Expander
An <xref:System.Windows.Controls.Expander> allows a user to view a header and expand that header to see further details, or to collapse a section up to a header.  
  
 The following illustration provides an example of this control in its expanded position.  
  
 ![Expander example](./media/expander/expander-control-example.jpg)
  
## In This Section  
 [Expander Overview](expander-overview.md)  
 [How-to Topics](expander-how-to-topics.md)  
  
## Reference  
 <xref:System.Windows.Controls.Expander>  
  
## Related Sections