// Helper method that displays the markup of interest for
        // creating the specified brush.
        private static string GenerateLinearGradientBrushMarkup(LinearGradientBrush theBrush)
        {
            var sBuilder = new StringBuilder();
            sBuilder.Append("<" + theBrush.GetType().Name + "\n" +
                            "  StartPoint=\"" + theBrush.StartPoint + "\"" +
                            "  EndPoint=\"" + theBrush.EndPoint + "\" \n" +
                            "  MappingMode=\"" + theBrush.MappingMode + "\"" +
                            "  SpreadMethod=\"" + theBrush.SpreadMethod + "\"\n" +
                            "  ColorInterpolationMode=\"" + theBrush.ColorInterpolationMode + "\"" +
                            "  Opacity=\"" + theBrush.Opacity.ToString(CultureInfo.InvariantCulture) + "\"" + ">\n");

            foreach (var stop in theBrush.GradientStops)
            {
                sBuilder.Append
                    (
                        "  <GradientStop Offset=\"" + stop.Offset.ToString("F4")
                        + "\" Color=\"" + stop.Color + "\" />\n"
                    );
            }
            sBuilder.Append("</LinearGradientBrush>");
            return sBuilder.ToString();
        }