/// <summary>
/// Synchronizes the properties.
/// </summary>
public override void SynchronizeProperties()
{
base.SynchronizeProperties();
var a = (Annotations.TextAnnotation)InternalAnnotation;
a.TextHorizontalAlignment = HorizontalAlignment.ToHorizontalAlignment();
a.Background = Background.ToOxyColor();
a.Offset = Offset.ToScreenVector();
a.TextVerticalAlignment = VerticalAlignment.ToVerticalAlignment();
a.Padding = Padding.ToOxyThickness();
a.Stroke = Stroke.ToOxyColor();
a.StrokeThickness = StrokeThickness;
}