---
title: "How to: Implement the INotifyPropertyChanged Interface"
description: Learn how to implement the INotifyPropertyChanged interface on business objects that are used in Windows Forms data binding. 
ms.date: "03/30/2017"
dev_langs: 
  - "csharp"
  - "vb"
helpviewer_keywords: 
  - "INotifyPropertyChanged interface [Windows Forms], implementing"
ms.assetid: eac428af-b43b-46ac-80d9-1a5f88658725
---
# How to: Implement the INotifyPropertyChanged Interface
The following code example demonstrates how to implement the <xref:System.ComponentModel.INotifyPropertyChanged> interface. Implement this interface on business objects that are used in Windows Forms data binding. When implemented, the interface  communicates to a bound control the property changes on a business object.  
  
## Example  
 [!code-csharp[System.ComponentModel.IPropertyChangeExample#1](~/samples/snippets/csharp/VS_Snippets_Winforms/System.ComponentModel.IPropertyChangeExample/CS/Form1.cs#1)]
 [!code-vb[System.ComponentModel.IPropertyChangeExample#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/System.ComponentModel.IPropertyChangeExample/VB/Form1.vb#1)]  
  
## See also

- [How to: Apply the PropertyNameChanged Pattern](how-to-apply-the-propertynamechanged-pattern.md)
- [Windows Forms Data Binding](windows-forms-data-binding.md)
- [How to: Raise Change Notifications Using a BindingSource and the INotifyPropertyChanged Interface](./controls/raise-change-notifications--bindingsource.md)
- [Change Notification in Windows Forms Data Binding](change-notification-in-windows-forms-data-binding.md)