/// <summary>
/// Handles changes to the StartAngle property.
/// </summary>
/// <param name="d">SprocketControl</param>
/// <param name="e">DependencyProperty changed event arguments</param>
private static void OnStartAngleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
SprocketControl sprocket = (SprocketControl)d;
double oldStartAngle = (double)e.OldValue;
double newStartAngle = sprocket.StartAngle;
sprocket.OnStartAngleChanged(oldStartAngle, newStartAngle);
}
