public void SetDefaultEmptyValues()
{
// set background values
this.gradientStartColor = Color.Empty;
this.gradientEndColor = Color.Empty;
this.direction = LinearGradientMode.Vertical;
// set padding values
this.padding.Left = 0;
this.padding.Top = 0;
this.padding.Right = 0;
this.padding.Bottom = 0;
// images
this.backImage = null;
this.stretchMode = ImageStretchMode.Tile;
this.watermark = null;
this.watermarkAlignment = ContentAlignment.BottomCenter;
}