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    The following example demonstrates how to persist and load settings using the application settings. 

    XAML
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    <Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">
  <Grid.Resources>
     <xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                                        Source="{Binding Source={x:Static Application.Current}, Path=Orders}" />
  </Grid.Resources>
  <DockPanel>
     <StackPanel Orientation="Horizontal"
                 DockPanel.Dock="Top">
        <Button Content="Save Settings"
                Click="SaveSettings" />
        <Button Content="Load Settings"
                Click="LoadSettings" />
     </StackPanel>
     <xcdg:DataGridControl x:Name="OrdersGrid"
        ItemsSource="{Binding Source={StaticResource cvs_orders}}">
     </xcdg:DataGridControl>
  </DockPanel>
</Grid>

    The following code provides the implementation required to persist and load settings using the application settings.

    VB.NET
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    Private Sub SaveSettings( ByVal sender As Object, ByVal e As RoutedEventArgs )
  If Xceed.Wpf.Documentation.Properties.Settings.Default.GridSettings Is Nothing Then
    Xceed.Wpf.Documentation.Properties.Settings.Default.GridSettings = New SettingsRepository()
  End If
  Me.OrdersGrid.SaveUserSettings( Xceed.Wpf.Documentation.Properties.Settings.Default.GridSettings, UserSettings.All )
End Sub
Private Sub LoadSettings( ByVal sender As Object, ByVal e As RoutedEventArgs )
  If Xceed.Wpf.Documentation.Properties.Settings.Default.GridSettings Is Nothing Then
    Return
  End If
  Me.OrdersGrid.LoadUserSettings( Xceed.Wpf.Documentation.Properties.Settings.Default.GridSettings, UserSettings.All )
End Sub
    C#
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    private void SaveSettings( object sender, RoutedEventArgs e )
{
 if( Xceed.Wpf.Documentation.Properties.Settings.Default.GridSettings == null )
 {
   Xceed.Wpf.Documentation.Properties.Settings.Default.GridSettings = new SettingsRepository();
 }
 this.OrdersGrid.SaveUserSettings( Xceed.Wpf.Documentation.Properties.Settings.Default.GridSettings, UserSettings.All );
}
private void LoadSettings( object sender, RoutedEventArgs e )
{
 if( Xceed.Wpf.Documentation.Properties.Settings.Default.GridSettings == null )
   return;
 this.OrdersGrid.LoadUserSettings( Xceed.Wpf.Documentation.Properties.Settings.Default.GridSettings, UserSettings.All );
}

    In addition to persisting and load the grid-specific settings to and from the resources, the application settings themselves must also be persisted using the default setting's Reload and Save methods, which are usually called in the application's OnStartup and OnExit overrides, respectively.

    VB.NET
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    Protected Overrides Sub OnStartup( ByVal e As StartupEventArgs )
  Xceed.Wpf.DataGrid.Licenser.LicenseKey = "license_key"
  MyBase.OnStartup( e )
  Settings.Default.Reload()
End Sub
Protected Override Sub OnExit( ByVal e As ExitEventArgs )
  Settings.Default.Save()
  MyBase.OnExit( e )
End Sub
    C#
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    protected override void OnStartup( StartupEventArgs e )
{
  Xceed.Wpf.DataGrid.Licenser.LicenseKey = "license_key";
  base.OnStartup( e ); 
  Settings.Default.Reload();
}
protected override void OnExit( ExitEventArgs e )
{ 
  Settings.Default.Save();
  base.OnExit( e );
}