/// <summary>
/// ContentProperty property changed handler.
/// </summary>
/// <param name="d">ButtonSpinner that changed its Content.</param>
/// <param name="e">Event arguments.</param>
private static void OnContentPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ButtonSpinner source = d as ButtonSpinner;
source.OnContentChanged(e.OldValue, e.NewValue);
}
private static void AllowSpinPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ButtonSpinner source = d as ButtonSpinner;
source.OnAllowSpinChanged((bool)e.OldValue, (bool)e.NewValue);
}