Binding is null

[lolohouse]

this example: <controls:ExtenderSwitch Grid.Row="8" Grid.Column="1" IsEnabled="{Binding IsEditing}" IsToggled="{Binding Customizing.IsShoppingOnline, Mode=TwoWay}" Style="{StaticResource CustomizingCard.CardSwitch}">

The FadeToAnimation.BindingContext is null, since, BeginAnimation not bindingContext to BaseAnimation.