public void UpdateProperties(IToolProperties toolProperties)
{
if(((GraphicToolProperties)toolProperties).Color != null)
Color = ((GraphicToolProperties)toolProperties).Color;
if (((GraphicToolProperties)toolProperties).Thickness != null)
Thickness = ((GraphicToolProperties)toolProperties).Thickness;
if (((GraphicToolProperties)toolProperties).Softness != null)
Softness = ((GraphicToolProperties)toolProperties).Softness;
}
}