The problem Recognition shape with ToggleSwitch

Hi:
this is the code of recoginition of form in class cs

private readonly Canvas _reconigtionCanvas;  
        private readonly InkCanvas _inkCanvas;  
  
        InkAnalyzer inkAnalyzer = new InkAnalyzer();  
        IReadOnlyList inkStrokes = null;  
        InkAnalysisResult inkAnalysisResults = null;  
  
  
        public InkRecognitionService(Canvas reconigtionCanvas, InkCanvas inkCanvas)  
        {  
            _reconigtionCanvas = reconigtionCanvas;  
            _inkCanvas = inkCanvas;  
  
  
        }  
  
  
          
  
  
  
        public void DrawEllipse(InkAnalysisInkDrawing shape)  
        {  
            var points = shape.Points;  
            Ellipse ellipse = new Ellipse();  
  
            ellipse.Width = shape.BoundingRect.Width;  
            ellipse.Width = shape.BoundingRect.Height;  
  
            Canvas.SetTop(ellipse, shape.BoundingRect.Top);  
            Canvas.SetLeft(ellipse, shape.BoundingRect.Left);  
  
            var brush = new SolidColorBrush(Windows.UI.ColorHelper.FromArgb(255, 0, 0, 255));  
            ellipse.Stroke = brush;  
            ellipse.StrokeThickness = 2;  
            _reconigtionCanvas.Children.Add(ellipse);  
        }  
  
        ///   
        ///   
        ///   
        ///   
  
        public void DrawPolygon(InkAnalysisInkDrawing shape)  
        {  
  
            List points = new List(shape.Points);  
            Polygon polygon = new Polygon();  
  
            foreach (Point point in points)  
            {  
                polygon.Points.Add(point);  
            }  
  
            var brush = new SolidColorBrush(Windows.UI.ColorHelper.FromArgb(255, 0, 0, 255));  
            polygon.Stroke = brush;  
            polygon.StrokeThickness = 2;  
            _reconigtionCanvas.Children.Add(polygon);  
        }  
  
  
        public  async Task RecognizeStrokes()  
        {  
  
  
           inkStrokes = _inkCanvas.InkPresenter.StrokeContainer.GetStrokes();  
  
            if (inkStrokes.Count > 0)  
            {  
                inkAnalyzer.AddDataForStrokes(inkStrokes);  
  
                inkAnalysisResults = await inkAnalyzer.AnalyzeAsync();  
  
                if (inkAnalysisResults.Status == InkAnalysisStatus.Updated)  
                {  
                    var inkwordNodes =  
                       inkAnalyzer.AnalysisRoot.FindNodes(  
                           InkAnalysisNodeKind.InkWord);  
                    foreach (InkAnalysisInkWord node in inkwordNodes)  
                    {  
  
                        foreach (var strokeId in node.GetStrokeIds())  
                        {  
                            var stroke = _inkCanvas.InkPresenter.StrokeContainer.GetStrokeById(strokeId);  
                            stroke.Selected = true;  
                        }  
  
                        inkAnalyzer.RemoveDataForStrokes(node.GetStrokeIds());  
                    }  
  
                    _inkCanvas.InkPresenter.StrokeContainer.DeleteSelected();  
  
                    var inkdrawingNodes =  
                        inkAnalyzer.AnalysisRoot.FindNodes(  
                            InkAnalysisNodeKind.InkDrawing);  
  
                    foreach (InkAnalysisInkDrawing node in inkdrawingNodes)  
                    {  
                        if (node.DrawingKind == InkAnalysisDrawingKind.Drawing)  
                        {  
                            // Catch and process  unsupported shapes.  
                        }  
                        else  
                        {  
                            if (node.DrawingKind == InkAnalysisDrawingKind.Circle ||  
                                 node.DrawingKind == InkAnalysisDrawingKind.Ellipse  )  
                            {  
                                DrawEllipse(node);  
                                 
                            }  
                            else  
                            {  
                                DrawPolygon(node);  
  
                                 
  
  
                            }  
                             
                            foreach (var strokeId in node.GetStrokeIds())  
                            {  
                                var stroke = _inkCanvas.InkPresenter.StrokeContainer.GetStrokeById(strokeId);  
                                stroke.Selected = true;  
                            }  
                        }  
  
                        inkAnalyzer.RemoveDataForStrokes(node.GetStrokeIds());  
                    }  
  
                    _inkCanvas.InkPresenter.StrokeContainer.DeleteSelected();  
                }  
            }  
  
  
  
        }  
  
  
    }  
}