public: DependencyProperty ShowArrowProperty = DependencyProperty.Register("ShowArrow", typeof(bool), typeof(ErrorMessageControl), new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));

public static readonly DependencyProperty ShowArrowProperty = DependencyProperty.Register("ShowArrow", typeof(bool), typeof(ErrorMessageControl), new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));

Public static readonly ShowArrowProperty As DependencyProperty = DependencyProperty.Register("ShowArrow", typeof(bool), typeof(ErrorMessageControl), new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure))