public static void AddLinearGradientBrush(this SerializationInfo info, string name, LinearGradientBrush brush)
{
info.AddValue(name + BrushTypeSuffix, LinearGradientBrushType);
info.AddRectangle(name + LinearGradientRectangleSuffix, brush.Rectangle);
info.AddColor(name + LinearGradientFirstColorSuffix, brush.LinearColors[0]);
info.AddColor(name + LinearGradientSecondColorSuffix, brush.LinearColors[1]);
}