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30 lines
1.4 KiB
Markdown
30 lines
1.4 KiB
Markdown
---
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title: "How to: Apply the PropertyNameChanged Pattern"
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ms.date: "03/30/2017"
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dev_langs:
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- "csharp"
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- "vb"
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helpviewer_keywords:
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- "custom controls [Windows Forms], property changes (using code)"
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- "data binding [Windows Forms], custom controls"
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- "PropertyNameChanged pattern [Windows Forms], applying"
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ms.assetid: aa47ddf6-5223-40c4-833f-a78992194836
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---
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# How to: Apply the PropertyNameChanged Pattern
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The following code example demonstrates how to apply the *PropertyName*Changed pattern to a custom control. Apply this pattern when you implement custom controls that are used with the Windows Forms data binding engine.
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## Example
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[!code-csharp[System.Windows.Forms.ChangeNotification#3](~/samples/snippets/csharp/VS_Snippets_Winforms/System.Windows.Forms.ChangeNotification/CS/Form1.cs#3)]
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[!code-vb[System.Windows.Forms.ChangeNotification#3](~/samples/snippets/visualbasic/VS_Snippets_Winforms/System.Windows.Forms.ChangeNotification/VB/Form1.vb#3)]
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## Compiling the Code
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To compile the previous code example:
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- Paste the code into an empty code file. You must use the custom control on a Windows Form that contains a `Main` method.
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## See also
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- [How to: Implement the INotifyPropertyChanged Interface](how-to-implement-the-inotifypropertychanged-interface.md)
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- [Change Notification in Windows Forms Data Binding](change-notification-in-windows-forms-data-binding.md)
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- [Windows Forms Data Binding](windows-forms-data-binding.md)
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