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Links: .NET Desktop - framework\winforms (#108)

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dotnet-desktop-guide/framework/winforms/controls/raise-change-notifications--bindingsource.md
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# How to: Raise Change Notifications Using a BindingSource and the INotifyPropertyChanged Interface
The <xref:System.Windows.Forms.BindingSource> component automatically detects changes in a data source when the type contained in the data source implements <xref:System.ComponentModel.INotifyPropertyChanged> and raises <xref:System.ComponentModel.INotifyPropertyChanged.PropertyChanged> events when a property value is changed. This change detection is useful because controls bound to the <xref:System.Windows.Forms.BindingSource> automatically update as the data source values change.
> [!NOTE]
> If your data source implements <xref:System.ComponentModel.INotifyPropertyChanged> and you are performing asynchronous operations, you should not make changes to the data source on a background thread. Instead, you should read the data on a background thread and merge the data into a list on the UI thread.
## Example
The following code example demonstrates a simple implementation of the <xref:System.ComponentModel.INotifyPropertyChanged> interface. It also shows how the <xref:System.Windows.Forms.BindingSource> automatically passes a data source change to a bound control when the <xref:System.Windows.Forms.BindingSource> is bound to a list of the <xref:System.ComponentModel.INotifyPropertyChanged> type.
If you use the `CallerMemberName` attribute, calls to the `NotifyPropertyChanged` method don't have to specify the property name as a string argument. For more information, see [Caller Information (C#)](https://docs.microsoft.com/dotnet/csharp/language-reference/attributes/caller-information) or [Caller Information (Visual Basic)](https://docs.microsoft.com/dotnet/visual-basic/programming-guide/concepts/caller-information).
If you use the `CallerMemberName` attribute, calls to the `NotifyPropertyChanged` method don't have to specify the property name as a string argument. For more information, see [Caller Information (C#)](/dotnet/csharp/language-reference/attributes/caller-information) or [Caller Information (Visual Basic)](/dotnet/visual-basic/programming-guide/concepts/caller-information).
[!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)]
## Compiling the Code
This example requires:
- References to the System, System.Data, System.Drawing, and System.Windows.Forms assemblies.