/// <summary>
 /// 获取图形填充颜色
 /// </summary>
 /// <returns></returns>
 private SolidColorBrush GetFillColor()
 {
     if (AnnChart is ShapeAnnotation shapeAnn)
     {
         return(ChartCommonMethod.ToSolidColor(shapeAnn.Fill));
     }
     else
     {
         return(Brushes.Transparent);
     }
 }
 /// <summary>
 /// 获取图形线条颜色
 /// </summary>
 /// <returns></returns>
 private SolidColorBrush GetBorderColor()
 {
     if (AnnChart is ShapeAnnotation shapeAnn)
     {
         return(ChartCommonMethod.ToSolidColor(shapeAnn.Stroke));
     }
     else
     {
         return(Brushes.Black);
     }
 }