Локализовать ToggleSwitch в Silverlight Toolkit можно с помощью DataTemplate
<toolkit:ToggleSwitch x:Name="MySwitch" Header="Localized Switch">
<toolkit:ToggleSwitch.ContentTemplate>
<DataTemplate>
<ContentControl HorizontalAlignment="Left"
Content="{Binding Converter={StaticResource Switch}}"/>
</DataTemplate>
</toolkit:ToggleSwitch.ContentTemplate>
</toolkit:ToggleSwitch>
Объявите ValueConverter:
public class BoolToSwitchConverter : IValueConverter
{
private string FalseValue = Resources.Off;
private string TrueValue = Resources.On;
public object Convert(object value, Type targetType, object parameter,
System.Globalization.CultureInfo culture)
{
if (value == null)
return FalseValue;
else
return ("On".Equals(value)) ? TrueValue : FalseValue;
}
public object ConvertBack(object value, Type targetType,
object parameter, System.Globalization.CultureInfo culture)
{
return value != null ? value.Equals(TrueValue) : false;
}
}
Подробнее здесь .